diff --git a/doc/en/scripting/builtins/libplayer.md b/doc/en/scripting/builtins/libplayer.md
index 99482c68..f71b8c95 100644
--- a/doc/en/scripting/builtins/libplayer.md
+++ b/doc/en/scripting/builtins/libplayer.md
@@ -77,6 +77,13 @@ player.get_spawnpoint(playerid: int) -> number, number, number
 
 Spawn point setter and getter
 
+```lua
+player.set_name(playerid: int, name: str)
+player.get_name(playerid: int) -> str
+```
+
+Player name setter and getter
+
 ```lua
 player.get_selected_block(playerid: int) -> x,y,z
 ```
diff --git a/doc/en/scripting/builtins/libworld.md b/doc/en/scripting/builtins/libworld.md
index 349e9106..5bf01abb 100644
--- a/doc/en/scripting/builtins/libworld.md
+++ b/doc/en/scripting/builtins/libworld.md
@@ -10,6 +10,8 @@ world.get_list() -> tables array {
     name: str,
     -- world icon/preview (loading automatically)
     icon: str
+    -- engine version the world was saved on
+    version: {int, int}
 }
 
 -- Returns current day time in range \[0.0-1.0\] 
diff --git a/doc/en/scripting/events.md b/doc/en/scripting/events.md
index 8dcd1a06..4b13ec7b 100644
--- a/doc/en/scripting/events.md
+++ b/doc/en/scripting/events.md
@@ -16,6 +16,12 @@ function on_broken(x, y, z, playerid)
 
 Called on block broken by player
 
+```lua
+function on_replaced(x, y, z, playerid)
+```
+
+Called on block replaced with other by player
+
 ```lua
 function on_interact(x, y, z, playerid) -> bool
 ```
diff --git a/doc/ru/scripting/builtins/libplayer.md b/doc/ru/scripting/builtins/libplayer.md
index 179e6b18..916fd4ab 100644
--- a/doc/ru/scripting/builtins/libplayer.md
+++ b/doc/ru/scripting/builtins/libplayer.md
@@ -77,6 +77,13 @@ player.get_spawnpoint(playerid: int) -> number, number, number
 
 Сеттер и геттер точки спавна игрока
 
+```lua
+player.set_name(playerid: int, name: str) 
+player.get_name(playerid: int) -> str
+```
+
+Сеттер и геттер имени игрока
+
 ```lua
 player.get_selected_block(playerid: int) -> x,y,z
 ```
diff --git a/doc/ru/scripting/builtins/libworld.md b/doc/ru/scripting/builtins/libworld.md
index b82f3b53..9d7d635e 100644
--- a/doc/ru/scripting/builtins/libworld.md
+++ b/doc/ru/scripting/builtins/libworld.md
@@ -9,7 +9,9 @@ world.get_list() -> массив таблиц {
     -- название мира
     name: str,
     -- предпросмотр (автоматически загружаемая текстура)
-    icon: str
+    icon: str,
+    -- версия движка, на которой был сохранен мир
+    version: {int, int}
 }
 
 -- Возвращает текущее игровое время от 0.0 до 1.0, где 0.0 и 1.0 - полночь, 0.5 - полдень.
diff --git a/doc/ru/scripting/events.md b/doc/ru/scripting/events.md
index 6d908459..08192cfa 100644
--- a/doc/ru/scripting/events.md
+++ b/doc/ru/scripting/events.md
@@ -16,6 +16,12 @@ function on_broken(x, y, z, playerid)
 
 Вызывается после разрушения блока игроком
 
+```lua
+function on_replaced(x, y, z, playerid)
+```
+
+Вызывается после замены блока игроком
+
 ```lua
 function on_interact(x, y, z, playerid) -> bool
 ```
diff --git a/res/layouts/pages/worlds.xml.lua b/res/layouts/pages/worlds.xml.lua
index 37c348a9..1cbcd53d 100644
--- a/res/layouts/pages/worlds.xml.lua
+++ b/res/layouts/pages/worlds.xml.lua
@@ -1,6 +1,13 @@
 function on_open()
     local worlds = world.get_list()
     for _, info in ipairs(worlds) do
+        local major, minor = core.get_version()
+        if info.version[1] > major or info.version[2] > minor then
+            info.versionColor = "#A02010"
+        else
+            info.versionColor = "#808080"
+        end
+        info.versionString = string.format("%s.%s", unpack(info.version))
         document.worlds:add(gui.template("world", info))
     end
 end
diff --git a/res/layouts/templates/world.xml b/res/layouts/templates/world.xml
index c20223fc..a258604b 100644
--- a/res/layouts/templates/world.xml
+++ b/res/layouts/templates/world.xml
@@ -14,4 +14,5 @@
             onclick='core.delete_world("%{name}")'>
         <image src='gui/delete_icon' size='32,32' color='#FFFFFF50'/>
     </button>
+    <label color='%{versionColor}' pos='317,44'>%{versionString}</label>
 </container>
diff --git a/res/presets/text3d/player_name.toml b/res/presets/text3d/player_name.toml
new file mode 100644
index 00000000..7942ff48
--- /dev/null
+++ b/res/presets/text3d/player_name.toml
@@ -0,0 +1,3 @@
+display = "projected"
+xray_opacity = 0.3
+render_distance = 128
diff --git a/src/content/ContentPack.hpp b/src/content/ContentPack.hpp
index b790d0e7..857f4fe0 100644
--- a/src/content/ContentPack.hpp
+++ b/src/content/ContentPack.hpp
@@ -97,6 +97,7 @@ struct ContentPackStats {
 
 struct world_funcs_set {
     bool onblockplaced : 1;
+    bool onblockreplaced : 1;
     bool onblockbroken : 1;
     bool onblockinteract : 1;
     bool onplayertick : 1;
diff --git a/src/engine.hpp b/src/engine.hpp
index 891606a5..04a221df 100644
--- a/src/engine.hpp
+++ b/src/engine.hpp
@@ -18,7 +18,6 @@
 #include <vector>
 #include <mutex>
 
-class Level;
 class Screen;
 class EnginePaths;
 class ResPaths;
diff --git a/src/frontend/screens/LevelScreen.cpp b/src/frontend/screens/LevelScreen.cpp
index 1acd9200..34d1db67 100644
--- a/src/frontend/screens/LevelScreen.cpp
+++ b/src/frontend/screens/LevelScreen.cpp
@@ -50,7 +50,7 @@ LevelScreen::LevelScreen(Engine* engine, std::unique_ptr<Level> levelPtr)
     hud = std::make_unique<Hud>(engine, *frontend, controller->getPlayer());
 
     decorator = std::make_unique<Decorator>(
-        *controller, *worldRenderer->particles, assets
+        *engine, *controller, *worldRenderer, assets
     );
 
     keepAlive(settings.graphics.backlight.observe([=](bool) {
diff --git a/src/graphics/render/ChunksRenderer.cpp b/src/graphics/render/ChunksRenderer.cpp
index 78ed45bf..9a72916c 100644
--- a/src/graphics/render/ChunksRenderer.cpp
+++ b/src/graphics/render/ChunksRenderer.cpp
@@ -251,14 +251,16 @@ void ChunksRenderer::drawSortedMeshes(const Camera& camera, Shader& shader) {
             continue;
         }
 
-        glm::vec3 min(chunk->x * CHUNK_W, chunk->bottom, chunk->z * CHUNK_D);
-        glm::vec3 max(
-            chunk->x * CHUNK_W + CHUNK_W,
-            chunk->top,
-            chunk->z * CHUNK_D + CHUNK_D
-        );
+        if (culling) {
+            glm::vec3 min(chunk->x * CHUNK_W, chunk->bottom, chunk->z * CHUNK_D);
+            glm::vec3 max(
+                chunk->x * CHUNK_W + CHUNK_W,
+                chunk->top,
+                chunk->z * CHUNK_D + CHUNK_D
+            );
 
-        if (!frustum.isBoxVisible(min, max)) continue;
+            if (!frustum.isBoxVisible(min, max)) continue;
+        }
 
         auto& chunkEntries = found->second.sortingMeshData.entries;
 
diff --git a/src/graphics/render/Decorator.cpp b/src/graphics/render/Decorator.cpp
index 4bac77af..b7bd4218 100644
--- a/src/graphics/render/Decorator.cpp
+++ b/src/graphics/render/Decorator.cpp
@@ -1,13 +1,22 @@
 #include "Decorator.hpp"
 
 #include "ParticlesRenderer.hpp"
+#include "WorldRenderer.hpp"
+#include "TextsRenderer.hpp"
+#include "TextNote.hpp"
 #include "assets/assets_util.hpp"
 #include "content/Content.hpp"
 #include "voxels/Chunks.hpp"
 #include "voxels/Block.hpp"
 #include "world/Level.hpp"
 #include "window/Camera.hpp"
+#include "objects/Players.hpp"
 #include "logic/LevelController.hpp"
+#include "util/stringutil.hpp"
+#include "engine.hpp"
+#include "files/files.hpp"
+
+namespace fs = std::filesystem;
 
 /// @brief Not greather than 64 for this BIG_PRIME value
 inline constexpr int UPDATE_AREA_DIAMETER = 32;
@@ -20,15 +29,32 @@ inline constexpr int ITERATIONS = 512;
 inline constexpr int BIG_PRIME = 666667;
 
 Decorator::Decorator(
-    LevelController& controller, ParticlesRenderer& particles, const Assets& assets
+    Engine& engine, LevelController& controller, WorldRenderer& renderer, const Assets& assets
 )
-    : level(*controller.getLevel()), particles(particles), assets(assets) {
+    : engine(engine),
+      level(*controller.getLevel()),
+      renderer(renderer),
+      assets(assets),
+      player(*controller.getPlayer()) {
     controller.getBlocksController()->listenBlockInteraction(
     [this](auto player, const auto& pos, const auto& def, BlockInteraction type) {
         if (type == BlockInteraction::placing && def.particles) {
             addParticles(def, pos);
         }
     });
+    for (const auto& [id, player] : *level.players) {
+        if (id == controller.getPlayer()->getId()) {
+            continue;
+        }
+        playerTexts[id] = renderer.texts->add(std::make_unique<TextNote>(
+            util::str2wstr_utf8(player->getName()),
+            playerNamePreset,
+            player->getPosition()
+        ));
+    }
+    playerNamePreset.deserialize(engine.getResPaths()->readCombinedObject(
+        "presets/text3d/player_name.toml"
+    ));
 }
 
 void Decorator::addParticles(const Block& def, const glm::ivec3& pos) {
@@ -37,7 +63,7 @@ void Decorator::addParticles(const Block& def, const glm::ivec3& pos) {
         auto treg = util::get_texture_region(
             assets, def.particles->texture, ""
         );
-        blockEmitters[pos] = particles.add(std::make_unique<Emitter>(
+        blockEmitters[pos] = renderer.particles->add(std::make_unique<Emitter>(
             level,
             glm::vec3{pos.x + 0.5, pos.y + 0.5, pos.z + 0.5},
             *def.particles,
@@ -81,7 +107,7 @@ void Decorator::update(float delta, const Camera& camera) {
     const auto& indices = *level.content->getIndices();
     auto iter = blockEmitters.begin();
     while (iter != blockEmitters.end()) {
-        auto emitter = particles.getEmitter(iter->second);
+        auto emitter = renderer.particles->getEmitter(iter->second);
         if (emitter == nullptr) {
             iter = blockEmitters.erase(iter);
             continue;
@@ -108,4 +134,28 @@ void Decorator::update(float delta, const Camera& camera) {
         }
         iter++;
     }
+
+    for (const auto& [id, player] : *level.players) {
+        if (id == this->player.getId() ||
+            playerTexts.find(id) != playerTexts.end()) {
+            continue;
+        }
+        playerTexts[id] = renderer.texts->add(std::make_unique<TextNote>(
+            util::str2wstr_utf8(player->getName()),
+            playerNamePreset,
+            player->getPosition()
+        ));
+    }
+
+    auto textsIter = playerTexts.begin();
+    while (textsIter != playerTexts.end()) {
+        auto note = renderer.texts->get(textsIter->second);
+        auto player = level.players->get(textsIter->first);
+        if (player == nullptr) {
+            textsIter = playerTexts.erase(textsIter);
+        } else {
+            note->setPosition(player->getPosition() + glm::vec3(0, 1, 0));
+            ++textsIter;
+        }
+    }
 }
diff --git a/src/graphics/render/Decorator.hpp b/src/graphics/render/Decorator.hpp
index 32f9540a..fbc196aa 100644
--- a/src/graphics/render/Decorator.hpp
+++ b/src/graphics/render/Decorator.hpp
@@ -6,20 +6,29 @@
 
 #include <unordered_map>
 
+#include "typedefs.hpp"
+#include "presets/NotePreset.hpp"
+
 class Level;
 class Chunks;
 class Camera;
 class Assets;
+class Player;
 struct Block;
+class Engine;
 class LevelController;
-class ParticlesRenderer;
+class WorldRenderer;
 
 class Decorator {
+    Engine& engine;
     const Level& level;
     const Assets& assets;
-    ParticlesRenderer& particles;
+    Player& player;
+    WorldRenderer& renderer;
     std::unordered_map<glm::ivec3, uint64_t> blockEmitters;
+    std::unordered_map<int64_t, u64id_t> playerTexts;
     int currentIndex = 0;
+    NotePreset playerNamePreset {};
 
     void update(
         float delta, const glm::ivec3& areaStart, const glm::ivec3& areaCenter
@@ -27,7 +36,10 @@ class Decorator {
     void addParticles(const Block& def, const glm::ivec3& pos);
 public:
     Decorator(
-        LevelController& level, ParticlesRenderer& particles, const Assets& assets
+        Engine& engine,
+        LevelController& level,
+        WorldRenderer& renderer,
+        const Assets& assets
     );
 
     void update(float delta, const Camera& camera);
diff --git a/src/graphics/render/TextsRenderer.cpp b/src/graphics/render/TextsRenderer.cpp
index 92b628f8..676ca349 100644
--- a/src/graphics/render/TextsRenderer.cpp
+++ b/src/graphics/render/TextsRenderer.cpp
@@ -61,6 +61,10 @@ void TextsRenderer::renderNote(
         if (preset.displayMode == NoteDisplayMode::XY_FREE_BILLBOARD) {
             yvec = camera.up;
         }
+        float scale =
+            (1.0f - preset.perspective) * glm::pow(glm::distance(camera.position, pos), 1.0f-preset.perspective);
+        xvec *= 1.0f + scale;
+        yvec *= 1.0f + scale;
     }
     if (preset.displayMode != NoteDisplayMode::PROJECTED) {
         if (!frustum.isBoxVisible(pos - xvec * (width * 0.5f), 
diff --git a/src/interfaces/Object.hpp b/src/interfaces/Object.hpp
deleted file mode 100644
index bb21fedb..00000000
--- a/src/interfaces/Object.hpp
+++ /dev/null
@@ -1,23 +0,0 @@
-#pragma once
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <iostream>
-
-class Level;
-
-class Object {
-private:
-
-public:
-    uint64_t objectUID;    
-    bool shouldUpdate = true;
-
-public:
-    ~Object() { destroyed(); }
-
-public:
-    virtual void spawned() {  }
-    virtual void update(float delta) { }
-    virtual void destroyed() {  }
-};
diff --git a/src/logic/BlocksController.cpp b/src/logic/BlocksController.cpp
index 01679546..980c8bfe 100644
--- a/src/logic/BlocksController.cpp
+++ b/src/logic/BlocksController.cpp
@@ -75,6 +75,13 @@ void BlocksController::breakBlock(
 void BlocksController::placeBlock(
     Player* player, const Block& def, blockstate state, int x, int y, int z
 ) {
+    auto voxel = chunks.get(x, y, z);
+    if (voxel == nullptr) {
+        return;
+    }
+    const auto& prevDef = level.content->getIndices()->blocks.require(voxel->id);
+    scripting::on_block_replaced(player, prevDef, {x, y, z});
+
     onBlockInteraction(
         player, glm::ivec3(x, y, z), def, BlockInteraction::placing
     );
diff --git a/src/logic/LevelController.cpp b/src/logic/LevelController.cpp
index bd8af15c..5d2ddd9b 100644
--- a/src/logic/LevelController.cpp
+++ b/src/logic/LevelController.cpp
@@ -5,7 +5,6 @@
 #include "debug/Logger.hpp"
 #include "engine.hpp"
 #include "files/WorldFiles.hpp"
-#include "interfaces/Object.hpp"
 #include "objects/Entities.hpp"
 #include "physics/Hitbox.hpp"
 #include "settings.hpp"
@@ -26,7 +25,7 @@ LevelController::LevelController(Engine* engine, std::unique_ptr<Level> levelPtr
           *level, settings.chunks.padding.get()
       )),
       player(std::make_unique<PlayerController>(
-        settings, this->level.get(), blocks.get()
+        settings, level.get(), blocks.get()
       )) {
     scripting::on_world_load(this);
 }
@@ -45,11 +44,6 @@ void LevelController::update(float delta, bool input, bool pause) {
 
     if (!pause) {
         // update all objects that needed
-        for (const auto& obj : level->objects) {
-            if (obj && obj->shouldUpdate) {
-                obj->update(delta);
-            }
-        }
         blocks->update(delta);
         player->update(delta, input, pause);
         level->entities->updatePhysics(delta);
@@ -57,17 +51,6 @@ void LevelController::update(float delta, bool input, bool pause) {
     }
     level->entities->clean();
     player->postUpdate(delta, input, pause);
-
-    // erease null pointers
-    auto& objects = level->objects;
-    objects.erase(
-        std::remove_if(
-            objects.begin(),
-            objects.end(),
-            [](auto obj) { return obj == nullptr; }
-        ),
-        objects.end()
-    );
 }
 
 void LevelController::saveWorld() {
diff --git a/src/logic/PlayerController.cpp b/src/logic/PlayerController.cpp
index 0ad5ef6b..0b23942e 100644
--- a/src/logic/PlayerController.cpp
+++ b/src/logic/PlayerController.cpp
@@ -13,6 +13,7 @@
 #include "lighting/Lighting.hpp"
 #include "objects/Entities.hpp"
 #include "objects/Player.hpp"
+#include "objects/Players.hpp"
 #include "physics/Hitbox.hpp"
 #include "physics/PhysicsSolver.hpp"
 #include "settings.hpp"
@@ -40,7 +41,7 @@ const float C_ZOOM = 0.1f;
 const float CROUCH_SHIFT_Y = -0.2f;
 
 CameraControl::CameraControl(
-    const std::shared_ptr<Player>& player, const CameraSettings& settings
+    Player* player, const CameraSettings& settings
 )
     : player(player),
       camera(player->fpCamera),
@@ -193,7 +194,7 @@ PlayerController::PlayerController(
     BlocksController* blocksController
 )
     : settings(settings), level(level),
-      player(level->getObject<Player>(0)),
+      player(level->players->get(0)),
       camControl(player, settings.camera),
       blocksController(blocksController),
       playerTickClock(20, 3) {
@@ -215,7 +216,7 @@ void PlayerController::onFootstep(const Hitbox& hitbox) {
                     continue;
                 }
                 blocksController->onBlockInteraction(
-                    player.get(),
+                    player,
                     glm::ivec3(x, y, z),
                     def,
                     BlockInteraction::step
@@ -254,7 +255,7 @@ void PlayerController::update(float delta, bool input, bool pause) {
         if (playerTickClock.update(delta)) {
             if (player->getId() % playerTickClock.getParts() ==
                 playerTickClock.getPart()) {
-                scripting::on_player_tick(player.get(), playerTickClock.getTickRate());
+                scripting::on_player_tick(player, playerTickClock.getTickRate());
             }
         }
     }
@@ -390,12 +391,12 @@ voxel* PlayerController::updateSelection(float maxDistance) {
     if (selection.entity != prevEntity) {
         if (prevEntity != ENTITY_NONE) {
             if (auto pentity = level->entities->get(prevEntity)) {
-                scripting::on_aim_off(*pentity, player.get());
+                scripting::on_aim_off(*pentity, player);
             }
         }
         if (selection.entity != ENTITY_NONE) {
             if (auto pentity = level->entities->get(selection.entity)) {
-                scripting::on_aim_on(*pentity, player.get());
+                scripting::on_aim_on(*pentity, player);
             }
         }
     }
@@ -432,8 +433,8 @@ void PlayerController::processRightClick(const Block& def, const Block& target)
 
     if (!input.shift && target.rt.funcsset.oninteract) {
         if (scripting::on_block_interact(
-                player.get(), target, selection.actualPosition
-            )) {
+            player, target, selection.actualPosition
+        )) {
             return;
         }
     }
@@ -474,7 +475,7 @@ void PlayerController::processRightClick(const Block& def, const Block& target)
             slot.setCount(slot.getCount()-1);
         }
         blocksController->placeBlock(
-            player.get(), def, state, coord.x, coord.y, coord.z
+            player, def, state, coord.x, coord.y, coord.z
         );
     }
 }
@@ -488,10 +489,10 @@ void PlayerController::updateEntityInteraction(
     }
     auto entity = *entityOpt;
     if (lclick) {
-        scripting::on_attacked(entity, player.get(), player->getEntity());
+        scripting::on_attacked(entity, player, player->getEntity());
     }
     if (rclick) {
-        scripting::on_entity_used(entity, player.get());
+        scripting::on_entity_used(entity, player);
     }
 }
 
@@ -523,7 +524,7 @@ void PlayerController::updateInteraction(float delta) {
     auto vox = updateSelection(maxDistance);
     if (vox == nullptr) {
         if (rclick && item.rt.funcsset.on_use) {
-            scripting::on_item_use(player.get(), item);
+            scripting::on_item_use(player, item);
         }
         if (selection.entity) {
             updateEntityInteraction(selection.entity, lattack, rclick);
@@ -534,7 +535,7 @@ void PlayerController::updateInteraction(float delta) {
     auto iend = selection.position;
     if (lclick && !input.shift && item.rt.funcsset.on_block_break_by) {
         if (scripting::on_item_break_block(
-            player.get(), item, iend.x, iend.y, iend.z
+            player, item, iend.x, iend.y, iend.z
         )) {
             return;
         }
@@ -543,7 +544,7 @@ void PlayerController::updateInteraction(float delta) {
     if (lclick) {
         if (player->isInstantDestruction() && target.breakable) {
             blocksController->breakBlock(
-                player.get(), target, iend.x, iend.y, iend.z
+                player, target, iend.x, iend.y, iend.z
             );
         }
     }
@@ -551,10 +552,10 @@ void PlayerController::updateInteraction(float delta) {
         bool preventDefault = false;
         if (item.rt.funcsset.on_use_on_block) {
             preventDefault = scripting::on_item_use_on_block(
-                player.get(), item, iend, selection.normal
+                player, item, iend, selection.normal
             );
         } else if (item.rt.funcsset.on_use) {
-            preventDefault = scripting::on_item_use(player.get(), item);
+            preventDefault = scripting::on_item_use(player, item);
         }
         if (preventDefault) {
             return;
@@ -566,10 +567,10 @@ void PlayerController::updateInteraction(float delta) {
     }
     if (Events::jactive(BIND_PLAYER_PICK)) {
         auto coord = selection.actualPosition;
-        pick_block(indices, chunks, player.get(), coord.x, coord.y, coord.z);
+        pick_block(indices, chunks, player, coord.x, coord.y, coord.z);
     }
 }
 
 Player* PlayerController::getPlayer() {
-    return player.get();
+    return player;
 }
diff --git a/src/logic/PlayerController.hpp b/src/logic/PlayerController.hpp
index 3fe3decf..8d82a3f9 100644
--- a/src/logic/PlayerController.hpp
+++ b/src/logic/PlayerController.hpp
@@ -18,7 +18,7 @@ struct CameraSettings;
 struct EngineSettings;
 
 class CameraControl {
-    std::shared_ptr<Player> player;
+    Player* player;
     std::shared_ptr<Camera> camera;
     const CameraSettings& settings;
     glm::vec3 offset;
@@ -40,7 +40,7 @@ class CameraControl {
     void switchCamera();
 public:
     CameraControl(
-        const std::shared_ptr<Player>& player, const CameraSettings& settings
+        Player* player, const CameraSettings& settings
     );
     void updateMouse(PlayerInput& input);
     void update(PlayerInput input, float delta, Chunks* chunks);
@@ -50,7 +50,7 @@ public:
 class PlayerController {
     const EngineSettings& settings;
     Level* level;
-    std::shared_ptr<Player> player;
+    Player* player;
     PlayerInput input {};
     CameraControl camControl;
     BlocksController* blocksController;
diff --git a/src/logic/scripting/lua/libs/libblock.cpp b/src/logic/scripting/lua/libs/libblock.cpp
index 20d3253d..2f24e0fe 100644
--- a/src/logic/scripting/lua/libs/libblock.cpp
+++ b/src/logic/scripting/lua/libs/libblock.cpp
@@ -2,6 +2,7 @@
 #include "lighting/Lighting.hpp"
 #include "logic/BlocksController.hpp"
 #include "logic/LevelController.hpp"
+#include "objects/Players.hpp"
 #include "voxels/Block.hpp"
 #include "voxels/Chunk.hpp"
 #include "voxels/Chunks.hpp"
@@ -350,9 +351,9 @@ static int l_place(lua::State* L) {
             "there is no block with index " + std::to_string(id)
         );
     }
-    auto player = level->getObject<Player>(playerid);
+    auto player = level->players->get(playerid);
     controller->getBlocksController()->placeBlock(
-        player ? player.get() : nullptr, *def, int2blockstate(state), x, y, z
+        player, *def, int2blockstate(state), x, y, z
     );
     return 0;
 }
@@ -367,10 +368,8 @@ static int l_destruct(lua::State* L) {
         return 0;
     }
     auto& def = level->content->getIndices()->blocks.require(voxel->id);
-    auto player = level->getObject<Player>(playerid);
-    controller->getBlocksController()->breakBlock(
-        player ? player.get() : nullptr, def, x, y, z
-    );
+    auto player = level->players->get(playerid);
+    controller->getBlocksController()->breakBlock(player, def, x, y, z);
     return 0;
 }
 
diff --git a/src/logic/scripting/lua/libs/libcore.cpp b/src/logic/scripting/lua/libs/libcore.cpp
index 5a100b9c..c656d0e6 100644
--- a/src/logic/scripting/lua/libs/libcore.cpp
+++ b/src/logic/scripting/lua/libs/libcore.cpp
@@ -20,6 +20,12 @@
 
 using namespace scripting;
 
+static int l_get_version(lua::State* L) {
+    return lua::pushvec_stack(
+        L, glm::vec2(ENGINE_VERSION_MAJOR, ENGINE_VERSION_MINOR)
+    );
+}
+
 /// @brief Creating new world
 /// @param name Name world
 /// @param seed Seed world
@@ -239,6 +245,7 @@ static int l_quit(lua::State*) {
 }
 
 const luaL_Reg corelib[] = {
+    {"get_version", lua::wrap<l_get_version>},
     {"new_world", lua::wrap<l_new_world>},
     {"open_world", lua::wrap<l_open_world>},
     {"reopen_world", lua::wrap<l_reopen_world>},
diff --git a/src/logic/scripting/lua/libs/libplayer.cpp b/src/logic/scripting/lua/libs/libplayer.cpp
index 18b29405..0628c5af 100644
--- a/src/logic/scripting/lua/libs/libplayer.cpp
+++ b/src/logic/scripting/lua/libs/libplayer.cpp
@@ -4,6 +4,7 @@
 #include "items/Inventory.hpp"
 #include "objects/Entities.hpp"
 #include "objects/Player.hpp"
+#include "objects/Players.hpp"
 #include "physics/Hitbox.hpp"
 #include "window/Camera.hpp"
 #include "world/Level.hpp"
@@ -11,8 +12,8 @@
 
 using namespace scripting;
 
-inline std::shared_ptr<Player> get_player(lua::State* L, int idx) {
-    return level->getObject<Player>(lua::tointeger(L, idx));
+inline Player* get_player(lua::State* L, int idx) {
+    return level->players->get(lua::tointeger(L, idx));
 }
 
 static int l_get_pos(lua::State* L) {
@@ -235,6 +236,20 @@ static int l_set_camera(lua::State* L) {
     return 0;
 }
 
+static int l_get_name(lua::State* L) {
+    if (auto player = get_player(L, 1)) {
+        return lua::pushstring(L, player->getName());
+    }
+    return 0;
+}
+
+static int l_set_name(lua::State* L) {
+    if (auto player = get_player(L, 1)) {
+        player->setName(lua::require_string(L, 2));
+    }
+    return 0;
+}
+
 const luaL_Reg playerlib[] = {
     {"get_pos", lua::wrap<l_get_pos>},
     {"set_pos", lua::wrap<l_set_pos>},
@@ -260,5 +275,7 @@ const luaL_Reg playerlib[] = {
     {"set_entity", lua::wrap<l_set_entity>},
     {"get_camera", lua::wrap<l_get_camera>},
     {"set_camera", lua::wrap<l_set_camera>},
+    {"get_name", lua::wrap<l_get_name>},
+    {"set_name", lua::wrap<l_set_name>},
     {NULL, NULL}
 };
diff --git a/src/logic/scripting/lua/libs/libworld.cpp b/src/logic/scripting/lua/libs/libworld.cpp
index 06da877c..5422c873 100644
--- a/src/logic/scripting/lua/libs/libworld.cpp
+++ b/src/logic/scripting/lua/libs/libworld.cpp
@@ -4,7 +4,9 @@
 
 #include "assets/Assets.hpp"
 #include "assets/AssetsLoader.hpp"
+#include "coders/json.hpp"
 #include "engine.hpp"
+#include "files/files.hpp"
 #include "files/engine_paths.hpp"
 #include "world/Level.hpp"
 #include "world/World.hpp"
@@ -32,22 +34,34 @@ static int l_get_list(lua::State* L) {
     for (size_t i = 0; i < worlds.size(); i++) {
         lua::createtable(L, 0, 1);
 
-        auto name = worlds[i].filename().u8string();
+        const auto& folder = worlds[i];
+
+        auto root = json::parse(files::read_string(folder/fs::u8path("world.json")));
+        const auto& versionMap = root["version"];
+        int versionMajor = versionMap["major"].asInteger();
+        int versionMinor = versionMap["minor"].asInteger();
+
+
+        auto name = folder.filename().u8string();
         lua::pushstring(L, name);
         lua::setfield(L, "name");
 
         auto assets = engine->getAssets();
         std::string icon = "world#" + name + ".icon";
         if (!AssetsLoader::loadExternalTexture(
-                assets,
-                icon,
-                {worlds[i] / fs::path("icon.png"),
-                 worlds[i] / fs::path("preview.png")}
-            )) {
+            assets,
+            icon,
+            {worlds[i] / fs::path("icon.png"),
+                worlds[i] / fs::path("preview.png")}
+        )) {
             icon = "gui/no_world_icon";
         }
         lua::pushstring(L, icon);
         lua::setfield(L, "icon");
+
+        lua::pushvec2(L, {versionMajor, versionMinor});
+        lua::setfield(L, "version");
+
         lua::rawseti(L, i + 1);
     }
     return 1;
diff --git a/src/logic/scripting/scripting.cpp b/src/logic/scripting/scripting.cpp
index 0778fd45..055ecf34 100644
--- a/src/logic/scripting/scripting.cpp
+++ b/src/logic/scripting/scripting.cpp
@@ -284,6 +284,32 @@ void scripting::on_block_placed(
     }
 }
 
+void scripting::on_block_replaced(
+    Player* player, const Block& block, const glm::ivec3& pos
+) {
+    if (block.rt.funcsset.onreplaced) {
+        std::string name = block.name + ".replaced";
+        lua::emit_event(lua::get_main_state(), name, [pos, player](auto L) {
+            lua::pushivec_stack(L, pos);
+            lua::pushinteger(L, player ? player->getId() : -1);
+            return 4;
+        });
+    }
+    auto args = [&](lua::State* L) {
+        lua::pushinteger(L, block.rt.id);
+        lua::pushivec_stack(L, pos);
+        lua::pushinteger(L, player ? player->getId() : -1);
+        return 5;
+    };
+    for (auto& [packid, pack] : content->getPacks()) {
+        if (pack->worldfuncsset.onblockreplaced) {
+            lua::emit_event(
+                lua::get_main_state(), packid + ":.blockreplaced", args
+            );
+        }
+    }
+}
+
 void scripting::on_block_broken(
     Player* player, const Block& block, const glm::ivec3& pos
 ) {
@@ -701,6 +727,8 @@ void scripting::load_content_script(
         register_event(env, "on_random_update", prefix + ".randupdate");
     funcsset.onbroken = register_event(env, "on_broken", prefix + ".broken");
     funcsset.onplaced = register_event(env, "on_placed", prefix + ".placed");
+    funcsset.onreplaced =
+        register_event(env, "on_replaced", prefix + ".replaced");
     funcsset.oninteract =
         register_event(env, "on_interact", prefix + ".interact");
     funcsset.onblockstick =
@@ -752,6 +780,8 @@ void scripting::load_world_script(
         register_event(env, "on_block_placed", prefix + ":.blockplaced");
     funcsset.onblockbroken =
         register_event(env, "on_block_broken", prefix + ":.blockbroken");
+    funcsset.onblockreplaced =
+        register_event(env, "on_block_replaced", prefix + ":.blockreplaced");
     funcsset.onblockinteract =
         register_event(env, "on_block_interact", prefix + ":.blockinteract");
     funcsset.onplayertick =
diff --git a/src/logic/scripting/scripting.hpp b/src/logic/scripting/scripting.hpp
index 3cd8a022..0ab3c035 100644
--- a/src/logic/scripting/scripting.hpp
+++ b/src/logic/scripting/scripting.hpp
@@ -71,6 +71,9 @@ namespace scripting {
     void on_block_placed(
         Player* player, const Block& block, const glm::ivec3& pos
     );
+    void on_block_replaced(
+        Player* player, const Block& block, const glm::ivec3& pos
+    );
     void on_block_broken(
         Player* player, const Block& block, const glm::ivec3& pos
     );
diff --git a/src/objects/Player.cpp b/src/objects/Player.cpp
index 5c2a2b85..ae8c0139 100644
--- a/src/objects/Player.cpp
+++ b/src/objects/Player.cpp
@@ -29,12 +29,16 @@ constexpr int SPAWN_ATTEMPTS_PER_UPDATE = 64;
 
 Player::Player(
     Level* level,
+    int64_t id,
+    const std::string& name,
     glm::vec3 position,
     float speed,
     std::shared_ptr<Inventory> inv,
     entityid_t eid
 )
     : level(level),
+      id(id),
+      name(name),
       speed(speed),
       chosenSlot(0),
       position(position),
@@ -49,8 +53,7 @@ Player::Player(
     tpCamera->setFov(glm::radians(90.0f));
 }
 
-Player::~Player() {
-}
+Player::~Player() = default;
 
 void Player::updateEntity() {
     if (eid == 0) {
@@ -268,6 +271,14 @@ entityid_t Player::getSelectedEntity() const {
     return selectedEid;
 }
 
+void Player::setName(const std::string& name) {
+    this->name = name;
+}
+
+const std::string& Player::getName() const {
+    return name;
+}
+
 const std::shared_ptr<Inventory>& Player::getInventory() const {
     return inventory;
 }
@@ -283,6 +294,9 @@ glm::vec3 Player::getSpawnPoint() const {
 dv::value Player::serialize() const {
     auto root = dv::object();
 
+    root["id"] = id;
+    root["name"] = name;
+
     root["position"] = dv::to_value(position);
     root["rotation"] = dv::to_value(cam);
     root["spawnpoint"] = dv::to_value(spawnpoint);
@@ -304,6 +318,9 @@ dv::value Player::serialize() const {
 }
 
 void Player::deserialize(const dv::value& src) {
+    src.at("id").get(id);
+    src.at("name").get(name);
+
     const auto& posarr = src["position"];
 
     dv::get_vec(posarr, position);
diff --git a/src/objects/Player.hpp b/src/objects/Player.hpp
index 2badd9dc..920e06e4 100644
--- a/src/objects/Player.hpp
+++ b/src/objects/Player.hpp
@@ -4,7 +4,6 @@
 #include <memory>
 #include <optional>
 
-#include "interfaces/Object.hpp"
 #include "interfaces/Serializable.hpp"
 #include "settings.hpp"
 #include "voxels/voxel.hpp"
@@ -40,8 +39,10 @@ struct CursorSelection {
     entityid_t entity = ENTITY_NONE;
 };
 
-class Player : public Object, public Serializable {
+class Player : public Serializable {
     Level* level;
+    int64_t id;
+    std::string name;
     float speed;
     int chosenSlot;
     glm::vec3 position;
@@ -52,7 +53,7 @@ class Player : public Object, public Serializable {
     bool infiniteItems = true;
     bool instantDestruction = true;
     entityid_t eid;
-    entityid_t selectedEid;
+    entityid_t selectedEid = 0;
 public:
     std::shared_ptr<Camera> fpCamera, spCamera, tpCamera;
     std::shared_ptr<Camera> currentCamera;
@@ -62,6 +63,8 @@ public:
 
     Player(
         Level* level,
+        int64_t id,
+        const std::string& name,
         glm::vec3 position,
         float speed,
         std::shared_ptr<Inventory> inv,
@@ -99,9 +102,12 @@ public:
 
     entityid_t getSelectedEntity() const;
 
+    void setName(const std::string& name);
+    const std::string& getName() const;
+
     const std::shared_ptr<Inventory>& getInventory() const;
 
-    glm::vec3 getPosition() const {
+    const glm::vec3& getPosition() const {
         return position;
     }
 
@@ -115,7 +121,7 @@ public:
 
     static void convert(dv::value& data, const ContentReport* report);
 
-    inline int getId() const {
-        return objectUID;
+    inline u64id_t getId() const {
+        return id;
     }
 };
diff --git a/src/objects/Players.cpp b/src/objects/Players.cpp
new file mode 100644
index 00000000..90031991
--- /dev/null
+++ b/src/objects/Players.cpp
@@ -0,0 +1,73 @@
+#include "Players.hpp"
+
+#include "Player.hpp"
+#include "items/Inventories.hpp"
+#include "world/Level.hpp"
+#include "world/World.hpp"
+
+Players::Players(Level* level) : level(level) {}
+
+void Players::addPlayer(std::unique_ptr<Player> player) {
+    players[player->getId()] = std::move(player);
+}
+
+Player* Players::get(int64_t id) const {
+    const auto& found = players.find(id);
+    if (found == players.end()) {
+        return nullptr;
+    }
+    return found->second.get();
+}
+
+Player* Players::create() {
+    auto playerPtr = std::make_unique<Player>(
+        level,
+        level->getWorld()->getInfo().nextPlayerId++,
+        "",
+        glm::vec3(0, DEF_PLAYER_Y, 0),
+        DEF_PLAYER_SPEED,
+        level->inventories->create(DEF_PLAYER_INVENTORY_SIZE),
+        0
+    );
+    auto player = playerPtr.get();
+    addPlayer(std::move(playerPtr));
+
+    level->inventories->store(player->getInventory());
+    return player;
+}
+
+dv::value Players::serialize() const {
+    auto root = dv::object();
+    auto& list = root.list("players");
+
+    for (const auto& [id, player] : players) {
+        list.add(player->serialize());
+    }
+    return root;
+}
+
+void Players::deserialize(const dv::value& src) {
+    players.clear();
+
+    const auto& players = src["players"];
+    for (auto& playerMap : players) {
+        auto playerPtr = std::make_unique<Player>(
+            level,
+            0,
+            "",
+            glm::vec3(0, DEF_PLAYER_Y, 0),
+            DEF_PLAYER_SPEED,
+            level->inventories->create(DEF_PLAYER_INVENTORY_SIZE),
+            0
+        );
+        auto player = playerPtr.get();
+        player->deserialize(playerMap);
+        addPlayer(std::move(playerPtr));
+        auto& inventory = player->getInventory();
+        // invalid inventory id pre 0.25
+        if (inventory->getId() == 0) {
+            inventory->setId(level->getWorld()->getNextInventoryId());
+        }
+        level->inventories->store(player->getInventory());
+    }
+}
diff --git a/src/objects/Players.hpp b/src/objects/Players.hpp
new file mode 100644
index 00000000..f66d181f
--- /dev/null
+++ b/src/objects/Players.hpp
@@ -0,0 +1,39 @@
+#pragma once
+
+#include <memory>
+#include <unordered_map>
+
+#include "typedefs.hpp"
+#include "interfaces/Serializable.hpp"
+
+inline constexpr float DEF_PLAYER_Y = 100.0f;
+inline constexpr float DEF_PLAYER_SPEED = 4.0f;
+inline constexpr int DEF_PLAYER_INVENTORY_SIZE = 40;
+
+class Level;
+class Player;
+
+class Players : public Serializable {
+    Level* level;
+    std::unordered_map<int64_t, std::unique_ptr<Player>> players;
+
+    void addPlayer(std::unique_ptr<Player> player);
+public:
+    Players(Level* level);
+
+    Player* get(int64_t id) const;
+
+    Player* create();
+
+    dv::value serialize() const override;
+
+    void deserialize(const dv::value& src) override;
+
+    auto begin() const {
+        return players.begin();
+    }
+
+    auto end() const {
+        return players.end();
+    }
+};
diff --git a/src/voxels/Block.hpp b/src/voxels/Block.hpp
index 4fe51b0d..95768c88 100644
--- a/src/voxels/Block.hpp
+++ b/src/voxels/Block.hpp
@@ -39,6 +39,7 @@ struct block_funcs_set {
     bool update : 1;
     bool onplaced : 1;
     bool onbroken : 1;
+    bool onreplaced : 1;
     bool oninteract : 1;
     bool randupdate : 1;
     bool onblockstick : 1;
diff --git a/src/world/Level.cpp b/src/world/Level.cpp
index 9c58d0dc..ed370d08 100644
--- a/src/world/Level.cpp
+++ b/src/world/Level.cpp
@@ -7,6 +7,7 @@
 #include "lighting/Lighting.hpp"
 #include "objects/Entities.hpp"
 #include "objects/Player.hpp"
+#include "objects/Players.hpp"
 #include "physics/Hitbox.hpp"
 #include "physics/PhysicsSolver.hpp"
 #include "settings.hpp"
@@ -28,8 +29,9 @@ Level::Level(
       physics(std::make_unique<PhysicsSolver>(glm::vec3(0, -22.6f, 0))),
       events(std::make_unique<LevelEvents>()),
       entities(std::make_unique<Entities>(this)),
+      players(std::make_unique<Players>(this)),
       settings(settings) {
-    auto& worldInfo = world->getInfo();
+    const auto& worldInfo = world->getInfo();
     auto& cameraIndices = content->getIndices(ResourceType::CAMERA);
     for (size_t i = 0; i < cameraIndices.size(); i++) {
         auto camera = std::make_shared<Camera>();
@@ -51,12 +53,6 @@ Level::Level(
     if (worldInfo.nextEntityId) {
         entities->setNextID(worldInfo.nextEntityId);
     }
-    auto inv = std::make_shared<Inventory>(
-        world->getNextInventoryId(), DEF_PLAYER_INVENTORY_SIZE
-    );
-    auto player = spawnObject<Player>(
-        this, glm::vec3(0, DEF_PLAYER_Y, 0), DEF_PLAYER_SPEED, inv, 0
-    );
 
     uint matrixSize =
         (settings.chunks.loadDistance.get() + settings.chunks.padding.get()) *
@@ -71,14 +67,9 @@ Level::Level(
     });
 
     inventories = std::make_unique<Inventories>(*this);
-    inventories->store(player->getInventory());
 }
 
-Level::~Level() {
-    for (auto obj : objects) {
-        obj.reset();
-    }
-}
+Level::~Level() = default;
 
 void Level::loadMatrix(int32_t x, int32_t z, uint32_t radius) {
     chunks->setCenter(x, z);
diff --git a/src/world/Level.hpp b/src/world/Level.hpp
index 767844cf..1f3ef183 100644
--- a/src/world/Level.hpp
+++ b/src/world/Level.hpp
@@ -2,12 +2,10 @@
 
 #include <memory>
 #include <vector>
+#include <string>
+#include <unordered_map>
 
-#include "interfaces/Object.hpp"
-
-inline constexpr float DEF_PLAYER_Y = 100.0f;
-inline constexpr float DEF_PLAYER_SPEED = 4.0f;
-inline constexpr int DEF_PLAYER_INVENTORY_SIZE = 40;
+#include "typedefs.hpp"
 
 class Content;
 class World;
@@ -19,6 +17,7 @@ class Lighting;
 class PhysicsSolver;
 class ChunksStorage;
 class Camera;
+class Players;
 struct EngineSettings;
 
 /// @brief A level, contains chunks and objects
@@ -26,7 +25,7 @@ class Level {
     std::unique_ptr<World> world;
 public:
     const Content* const content;
-    std::vector<std::shared_ptr<Object>> objects;
+    
     std::unique_ptr<Chunks> chunks;
     std::unique_ptr<ChunksStorage> chunksStorage;
     std::unique_ptr<Inventories> inventories;
@@ -35,6 +34,7 @@ public:
     std::unique_ptr<Lighting> lighting;
     std::unique_ptr<LevelEvents> events;
     std::unique_ptr<Entities> entities;
+    std::unique_ptr<Players> players;
     std::vector<std::shared_ptr<Camera>> cameras;  // move somewhere?
 
     const EngineSettings& settings;
@@ -52,36 +52,6 @@ public:
 
     const World* getWorld() const;
 
-    /// Spawns object of class T and returns pointer to it.
-    /// @param T class that derives the Object class
-    /// @param args pass arguments needed for T class constructor
-    template <class T, typename... Args>
-    std::shared_ptr<T> spawnObject(Args&&... args) {
-        static_assert(
-            std::is_base_of<Object, T>::value,
-            "T must be a derived of Object class"
-        );
-        std::shared_ptr<T> tObj = std::make_shared<T>(args...);
-
-        std::shared_ptr<Object> obj =
-            std::dynamic_pointer_cast<Object, T>(tObj);
-        obj->objectUID = objects.size();
-        objects.push_back(obj);
-        obj->spawned();
-        return tObj;
-    }
-
-    template <class T>
-    std::shared_ptr<T> getObject(uint64_t id) const {
-        static_assert(
-            std::is_base_of<Object, T>::value,
-            "T must be a derived of Object class"
-        );
-        if (id >= objects.size()) return nullptr;
-        std::shared_ptr<T> object = std::dynamic_pointer_cast<T>(objects[id]);
-        return object;
-    }
-
     void onSave();
 
     std::shared_ptr<Camera> getCamera(const std::string& name);
diff --git a/src/world/World.cpp b/src/world/World.cpp
index 0f6ea373..4eb2631a 100644
--- a/src/world/World.cpp
+++ b/src/world/World.cpp
@@ -11,6 +11,7 @@
 #include "items/Inventories.hpp"
 #include "objects/Entities.hpp"
 #include "objects/Player.hpp"
+#include "objects/Players.hpp"
 #include "settings.hpp"
 #include "voxels/Chunk.hpp"
 #include "voxels/Chunks.hpp"
@@ -69,13 +70,7 @@ void World::write(Level* level) {
     info.nextEntityId = level->entities->peekNextID();
     wfile->write(this, content);
 
-    auto playerFile = dv::object();
-    auto& players = playerFile.list("players");
-    for (const auto& object : level->objects) {
-        if (auto player = std::dynamic_pointer_cast<Player>(object)) {
-            players.add(player->serialize());
-        }
-    }
+    auto playerFile = level->players->serialize();
     files::write_json(wfile->getPlayerFile(), playerFile);
 
     writeResources(content);
@@ -100,7 +95,9 @@ std::unique_ptr<Level> World::create(
         content,
         packs
     );
-    return std::make_unique<Level>(std::move(world), content, settings);
+    auto level = std::make_unique<Level>(std::move(world), content, settings);
+    level->players->create();
+    return level;
 }
 
 std::unique_ptr<Level> World::load(
@@ -121,45 +118,23 @@ std::unique_ptr<Level> World::load(
                   << " generator: " << info->generator;
 
     auto world = std::make_unique<World>(
-        info.value(),
-        std::move(worldFilesPtr),
-        content,
-        packs
+        info.value(), std::move(worldFilesPtr), content, packs
     );
     auto& wfile = world->wfile;
     wfile->readResourcesData(content);
 
     auto level = std::make_unique<Level>(std::move(world), content, settings);
-    {
-        fs::path file = wfile->getPlayerFile();
-        if (!fs::is_regular_file(file)) {
-            logger.warning() << "player.json does not exists";
-        } else {
-            auto playerRoot = files::read_json(file);
-            if (playerRoot.has("players")) {
-                level->objects.clear();
-                const auto& players = playerRoot["players"];
-                for (auto& playerMap : players) {
-                    auto player = level->spawnObject<Player>(
-                        level.get(),
-                        glm::vec3(0, DEF_PLAYER_Y, 0),
-                        DEF_PLAYER_SPEED,
-                        level->inventories->create(DEF_PLAYER_INVENTORY_SIZE),
-                        0
-                    );
-                    player->deserialize(playerMap);
-                    auto& inventory = player->getInventory();
-                    // invalid inventory id pre 0.25
-                    if (inventory->getId() == 0) {
-                        inventory->setId(level->getWorld()->getNextInventoryId());
-                    }
-                    level->inventories->store(player->getInventory());
-                }
-            } else {
-                auto player = level->getObject<Player>(0);
-                player->deserialize(playerRoot);
-                level->inventories->store(player->getInventory());
-            }
+
+    fs::path file = wfile->getPlayerFile();
+    if (!fs::is_regular_file(file)) {
+        logger.warning() << "player.json does not exists";
+        level->players->create();
+    } else {
+        auto playerRoot = files::read_json(file);
+        level->players->deserialize(playerRoot);
+
+        if (!playerRoot["players"][0].has("id")) {
+            level->getWorld()->getInfo().nextPlayerId++;
         }
     }
     return level;
@@ -231,6 +206,7 @@ void WorldInfo::deserialize(const dv::value& root) {
     }
     nextInventoryId = root["next-inventory-id"].asInteger(2);
     nextEntityId = root["next-entity-id"].asInteger(1);
+    root.at("next-player-id").get(nextPlayerId);
 }
 
 dv::value WorldInfo::serialize() const {
@@ -254,5 +230,6 @@ dv::value WorldInfo::serialize() const {
 
     root["next-inventory-id"] = nextInventoryId;
     root["next-entity-id"] = nextEntityId;
+    root["next-player-id"] = nextPlayerId;
     return root;
 }
diff --git a/src/world/World.hpp b/src/world/World.hpp
index 2f8e7fb3..24042c40 100644
--- a/src/world/World.hpp
+++ b/src/world/World.hpp
@@ -28,6 +28,7 @@ struct WorldInfo : public Serializable {
     std::string generator;
     uint64_t seed;
     int64_t nextInventoryId = 1;
+    int64_t nextPlayerId = 0;
 
     /// @brief Day/night loop timer in range 0..1 where
     /// 0.0 - is midnight and