diff --git a/res/content/base/icon.png b/res/content/base/icon.png
new file mode 100644
index 00000000..eadccdbc
Binary files /dev/null and b/res/content/base/icon.png differ
diff --git a/res/texts/en_US.txt b/res/texts/en_US.txt
index f26803bd..3a25444c 100644
--- a/res/texts/en_US.txt
+++ b/res/texts/en_US.txt
@@ -2,6 +2,7 @@
 menu.missing-content=Missing Content!
 world.convert-request=Content indices have changed! Convert world files?
 error.pack-not-found=Could not to find pack
+error.dependency-not-found=Dependency pack is not found
 world.delete-confirm=Do you want to delete world forever?
 
 # Bindings
diff --git a/res/texts/ru_RU.txt b/res/texts/ru_RU.txt
index 61a33233..65085d46 100644
--- a/res/texts/ru_RU.txt
+++ b/res/texts/ru_RU.txt
@@ -5,8 +5,10 @@ Ok=Ок
 Cancel=Отмена
 Back=Назад
 Continue=Продолжить
+Add=Добавить
 
 error.pack-not-found=Не удалось найти пакет
+error.dependency-not-found=Используемая зависимость не найдена
 
 # Меню
 menu.New World=Новый Мир
diff --git a/res/textures/gui/no_icon.png b/res/textures/gui/no_icon.png
new file mode 100644
index 00000000..f2229a0e
Binary files /dev/null and b/res/textures/gui/no_icon.png differ
diff --git a/src/assets/AssetsLoader.cpp b/src/assets/AssetsLoader.cpp
index 0087389d..9ef4696d 100644
--- a/src/assets/AssetsLoader.cpp
+++ b/src/assets/AssetsLoader.cpp
@@ -60,6 +60,7 @@ void AssetsLoader::addDefaults(AssetsLoader& loader, bool allAssets) {
         loader.add(ASSET_SHADER, SHADERS_FOLDER"/skybox_gen", "skybox_gen");
         loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/gui/menubg.png", "gui/menubg");
         loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/gui/delete_icon.png", "gui/delete_icon");
+        loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/gui/no_icon.png", "gui/no_icon");
         loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/misc/moon.png", "misc/moon");
         loader.add(ASSET_TEXTURE, TEXTURES_FOLDER"/misc/sun.png", "misc/sun");
         loader.add(ASSET_FONT, FONTS_FOLDER"/font", "normal");
diff --git a/src/content/ContentPack.cpp b/src/content/ContentPack.cpp
index 3053d697..087eb6cb 100644
--- a/src/content/ContentPack.cpp
+++ b/src/content/ContentPack.cpp
@@ -67,8 +67,17 @@ ContentPack ContentPack::read(fs::path folder) {
     root->str("id", pack.id);
     root->str("title", pack.title);
     root->str("version", pack.version);
+    root->str("creator", pack.creator);
+    root->str("description", pack.description);
     pack.folder = folder;
 
+    auto dependencies = root->list("dependencies");
+    if (dependencies) {
+        for (size_t i = 0; i < dependencies->size(); i++) {
+            pack.dependencies.push_back(dependencies->str(i));
+        }
+    }
+
     if (pack.id == "none")
         throw contentpack_error(pack.id, folder, 
             "content-pack id is not specified");
@@ -92,6 +101,12 @@ void ContentPack::scan(fs::path rootfolder,
     }
 }
 
+void ContentPack::scan(EnginePaths* paths,
+                       std::vector<ContentPack>& packs) {
+    scan(paths->getResources()/fs::path("content"), packs);
+    scan(paths->getWorldFolder()/fs::path("content"), packs);
+}
+
 std::vector<std::string> ContentPack::worldPacksList(fs::path folder) {
     fs::path listfile = folder / fs::path("packs.list");
     if (!fs::is_regular_file(listfile)) {
@@ -111,8 +126,7 @@ fs::path ContentPack::findPack(const EnginePaths* paths, fs::path worldDir, std:
     if (fs::is_directory(folder)) {
         return folder;
     }
-    throw contentpack_error(name, folder, 
-                            "could not to find pack '"+name+"'");
+    return folder;
 }
 
 void ContentPack::readPacks(const EnginePaths* paths,
@@ -121,6 +135,10 @@ void ContentPack::readPacks(const EnginePaths* paths,
                             fs::path worldDir) {
     for (const auto& name : packnames) {
         fs::path packfolder = ContentPack::findPack(paths, worldDir, name);
+        if (!fs::is_directory(packfolder)) {
+            throw contentpack_error(name, packfolder, 
+                                    "could not to find pack '"+name+"'");
+        }
         packs.push_back(ContentPack::read(packfolder));
     }
 }
diff --git a/src/content/ContentPack.h b/src/content/ContentPack.h
index c233532a..6f82519a 100644
--- a/src/content/ContentPack.h
+++ b/src/content/ContentPack.h
@@ -24,7 +24,10 @@ struct ContentPack {
     std::string id = "none";
     std::string title = "untitled";
     std::string version = "0.0";
+    std::string creator = "";
+    std::string description = "no description";
     std::filesystem::path folder;
+    std::vector<std::string> dependencies;
 
     std::filesystem::path getContentFile() const;
 
@@ -36,8 +39,12 @@ struct ContentPack {
 
     static bool is_pack(std::filesystem::path folder);
     static ContentPack read(std::filesystem::path folder);
+
     static void scan(std::filesystem::path folder, 
                      std::vector<ContentPack>& packs);
+    static void scan(EnginePaths* paths, 
+                     std::vector<ContentPack>& packs);
+    
     static std::vector<std::string> worldPacksList(std::filesystem::path folder);
 
     static std::filesystem::path findPack(
diff --git a/src/engine.cpp b/src/engine.cpp
index 8b39b825..32673e11 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -176,7 +176,7 @@ void Engine::loadWorldContent(const fs::path& folder) {
 void Engine::loadAllPacks() {
 	auto resdir = paths->getResources();
 	contentPacks.clear();
-	ContentPack::scan(resdir/fs::path("content"), contentPacks);
+	ContentPack::scan(paths, contentPacks);
 }
 
 void Engine::setScreen(std::shared_ptr<Screen> screen) {
@@ -212,3 +212,7 @@ std::vector<ContentPack>& Engine::getContentPacks() {
 EnginePaths* Engine::getPaths() {
 	return paths;
 }
+
+std::shared_ptr<Screen> Engine::getScreen() {
+    return screen;
+}
\ No newline at end of file
diff --git a/src/engine.h b/src/engine.h
index d4b98b91..595b80da 100644
--- a/src/engine.h
+++ b/src/engine.h
@@ -63,6 +63,8 @@ public:
     void loadContent();
     void loadWorldContent(const fs::path& folder);
 	void loadAllPacks();
+
+    std::shared_ptr<Screen> getScreen();
 };
 
 #endif // SRC_ENGINE_H_
\ No newline at end of file
diff --git a/src/files/WorldFiles.cpp b/src/files/WorldFiles.cpp
index 95449b46..2de7829b 100644
--- a/src/files/WorldFiles.cpp
+++ b/src/files/WorldFiles.cpp
@@ -453,13 +453,18 @@ void WorldFiles::write(const World* world, const Content* content) {
 }
 
 void WorldFiles::writePacks(const World* world) {
+    auto packsFile = getPacksFile();
+    if (fs::is_regular_file(packsFile)) {
+        return;
+    }
+
 	const auto& packs = world->getPacks();
 	std::stringstream ss;
 	ss << "# autogenerated; do not modify\n";
 	for (const auto& pack : packs) {
 		ss << pack.id << "\n";
 	}
-	files::write_string(getPacksFile(), ss.str());
+	files::write_string(packsFile, ss.str());
 }
 
 void WorldFiles::writeIndices(const ContentIndices* indices) {
@@ -574,3 +579,15 @@ bool WorldFiles::readPlayer(Player* player) {
     }
 	return true;
 }
+
+void WorldFiles::addPack(const std::string& id) {
+    auto packs = files::read_list(getPacksFile());
+    packs.push_back(id);
+
+	std::stringstream ss;
+	ss << "# autogenerated; do not modify\n";
+	for (const auto& pack : packs) {
+		ss << pack << "\n";
+	}
+	files::write_string(getPacksFile(), ss.str());
+}
diff --git a/src/files/WorldFiles.h b/src/files/WorldFiles.h
index 3b76bf7b..291604dc 100644
--- a/src/files/WorldFiles.h
+++ b/src/files/WorldFiles.h
@@ -146,6 +146,8 @@ public:
 	void write(const World* world, const Content* content);
 	void writePacks(const World* world);
 	void writeIndices(const ContentIndices* indices);
+    /* Append pack to packs.list without duplicate check */
+    void addPack(const std::string& id);
 
     static const char* WORLD_FILE;
 };
diff --git a/src/files/engine_paths.cpp b/src/files/engine_paths.cpp
index 482ff029..a657a3ca 100644
--- a/src/files/engine_paths.cpp
+++ b/src/files/engine_paths.cpp
@@ -43,6 +43,10 @@ fs::path EnginePaths::getWorldsFolder() {
     return userfiles/fs::path("worlds");
 }
 
+fs::path EnginePaths::getWorldFolder() {
+    return worldFolder;
+}
+
 std::vector<fs::path> EnginePaths::scanForWorlds() {
     std::vector<fs::path> folders;
 
diff --git a/src/files/engine_paths.h b/src/files/engine_paths.h
index 29b3b2e7..760a1ba5 100644
--- a/src/files/engine_paths.h
+++ b/src/files/engine_paths.h
@@ -12,7 +12,7 @@ namespace fs = std::filesystem;
 class EnginePaths {
     fs::path userfiles {"."};
     fs::path resources {"res"}; 
-    fs::path worldFolder {""};
+    fs::path worldFolder;
     std::vector<ContentPack>* contentPacks = nullptr;
 public:
     fs::path getUserfiles() const;
@@ -20,6 +20,7 @@ public:
     
     fs::path getScreenshotFile(std::string ext);
     fs::path getWorldsFolder();
+    fs::path getWorldFolder();
     bool isWorldNameUsed(std::string name);
 
     void setUserfiles(fs::path folder);
diff --git a/src/frontend/WorldRenderer.cpp b/src/frontend/WorldRenderer.cpp
index d61394b4..7cd2f0f2 100644
--- a/src/frontend/WorldRenderer.cpp
+++ b/src/frontend/WorldRenderer.cpp
@@ -37,8 +37,6 @@
 using glm::vec3;
 using glm::vec4;
 using glm::mat4;
-using std::string;
-using std::shared_ptr;
 
 WorldRenderer::WorldRenderer(Engine* engine, LevelFrontend* frontend) 
 	: engine(engine), 
@@ -76,7 +74,7 @@ bool WorldRenderer::drawChunk(size_t index,
 	if (!chunk->isLighted()) {
 		return false;
 	}
-	shared_ptr<Mesh> mesh = renderer->getOrRender(chunk.get());
+	auto mesh = renderer->getOrRender(chunk.get());
 	if (mesh == nullptr) {
 		return false;
 	}
@@ -102,16 +100,15 @@ void WorldRenderer::drawChunks(Chunks* chunks,
 							   Shader* shader) {
 	std::vector<size_t> indices;
 	for (size_t i = 0; i < chunks->volume; i++){
-		shared_ptr<Chunk> chunk = chunks->chunks[i];
-		if (chunk == nullptr)
+		if (chunks->chunks[i] == nullptr)
 			continue;
 		indices.push_back(i);
 	}
 	float px = camera->position.x / (float)CHUNK_W;
 	float pz = camera->position.z / (float)CHUNK_D;
 	std::sort(indices.begin(), indices.end(), [this, chunks, px, pz](size_t i, size_t j) {
-		shared_ptr<Chunk> a = chunks->chunks[i];
-		shared_ptr<Chunk> b = chunks->chunks[j];
+		auto a = chunks->chunks[i];
+		auto b = chunks->chunks[j];
 		return ((a->x + 0.5f - px)*(a->x + 0.5f - px) + 
 				(a->z + 0.5f - pz)*(a->z + 0.5f - pz)
 				>
diff --git a/src/frontend/gui/GUI.h b/src/frontend/gui/GUI.h
index df3cdcff..3e159f4a 100644
--- a/src/frontend/gui/GUI.h
+++ b/src/frontend/gui/GUI.h
@@ -45,6 +45,7 @@ class Camera;
 
 namespace gui {
     typedef std::function<void()> runnable;
+    typedef std::function<void(const std::string&)> stringconsumer;
 
     class UINode;
     class Container;
diff --git a/src/frontend/gui/UINode.h b/src/frontend/gui/UINode.h
index 668e4d97..6f909ba5 100644
--- a/src/frontend/gui/UINode.h
+++ b/src/frontend/gui/UINode.h
@@ -81,7 +81,7 @@ namespace gui {
         virtual glm::vec2 contentOffset() {return glm::vec2(0.0f);};
         glm::vec2 calcCoord() const;
         virtual void setCoord(glm::vec2 coord);
-        glm::vec2 size() const;
+        virtual glm::vec2 size() const;
         virtual void size(glm::vec2 size);
         void _size(glm::vec2 size);
         virtual void refresh() {};
diff --git a/src/frontend/gui/controls.cpp b/src/frontend/gui/controls.cpp
index 626c47de..54188b43 100644
--- a/src/frontend/gui/controls.cpp
+++ b/src/frontend/gui/controls.cpp
@@ -22,6 +22,13 @@ const uint KEY_BACKSPACE = 259;
 
 using namespace gui;
 
+Label::Label(string text, string fontName) 
+     : UINode(vec2(), vec2(text.length() * 8, 15)), 
+       text_(util::str2wstr_utf8(text)), 
+       fontName_(fontName) {
+}
+
+
 Label::Label(wstring text, string fontName) 
      : UINode(vec2(), vec2(text.length() * 8, 15)), 
        text_(text), 
@@ -64,6 +71,7 @@ void Label::size(vec2 sizenew) {
 
 // ================================= Image ====================================
 Image::Image(string texture, vec2 size) : UINode(vec2(), size), texture(texture) {
+    setInteractive(false);
 }
 
 void Image::draw(Batch2D* batch, Assets* assets) {
diff --git a/src/frontend/gui/controls.h b/src/frontend/gui/controls.h
index 60587248..af77863a 100644
--- a/src/frontend/gui/controls.h
+++ b/src/frontend/gui/controls.h
@@ -32,6 +32,7 @@ namespace gui {
         std::string fontName_;
         wstringsupplier supplier = nullptr;
     public:
+        Label(std::string text, std::string fontName="normal");
         Label(std::wstring text, std::string fontName="normal");
 
         virtual Label& text(std::wstring text);
@@ -40,6 +41,9 @@ namespace gui {
         virtual void draw(Batch2D* batch, Assets* assets) override;
 
         virtual Label* textSupplier(wstringsupplier supplier);
+        virtual glm::vec2 size() const override {
+            return UINode::size();
+        }
         virtual void size(glm::vec2 size) override;
     };
 
diff --git a/src/frontend/menu.cpp b/src/frontend/menu.cpp
index a7701e9a..6f8957af 100644
--- a/src/frontend/menu.cpp
+++ b/src/frontend/menu.cpp
@@ -4,6 +4,7 @@
 #include <memory>
 #include <sstream>
 #include <iostream>
+#include <algorithm>
 #include <filesystem>
 #include <glm/glm.hpp>
 
@@ -11,6 +12,8 @@
 #include "gui/panels.h"
 #include "gui/controls.h"
 #include "screens.h"
+
+#include "../coders/png.h"
 #include "../util/stringutil.h"
 #include "../files/engine_paths.h"
 #include "../files/WorldConverter.h"
@@ -98,6 +101,25 @@ void show_content_missing(Engine* engine, const Content* content,
             subpanel->add(hpanel);
         }
     }
+
+    for (size_t i = 0; i < lut->countItems(); i++) {
+        // missing block
+        if (lut->getItemId(i) == ITEM_VOID) {
+            auto name = lut->getItemName(i);
+            Panel* hpanel = new Panel(vec2(500, 30));
+            hpanel->color(vec4(0.0f));
+            hpanel->orientation(Orientation::horizontal);
+            
+            Label* namelabel = new Label(util::str2wstr_utf8(name));
+            namelabel->color(vec4(1.0f, 0.2f, 0.2f, 0.5f));
+
+            Label* typelabel = new Label(L"[item]");
+            typelabel->color(vec4(0.5f));
+            hpanel->add(typelabel);
+            hpanel->add(namelabel);
+            subpanel->add(hpanel);
+        }
+    }
     subpanel->maxLength(400);
     panel->add(subpanel);
 
@@ -248,10 +270,109 @@ void create_main_menu_panel(Engine* engine, PagesControl* menu) {
     }));
 }
 
+typedef std::function<void(const ContentPack& pack)> packconsumer;
+
+std::shared_ptr<Panel> create_packs_panel(const std::vector<ContentPack>& packs, Engine* engine, bool backbutton, packconsumer callback) {
+    auto assets = engine->getAssets();
+    auto panel = std::make_shared<Panel>(vec2(400, 200), vec4(5.0f));
+    panel->color(vec4(1.0f, 1.0f, 1.0f, 0.07f));
+    panel->maxLength(400);
+    panel->scrollable(true);
+
+    for (auto& pack : packs) {
+        auto packpanel = std::make_shared<RichButton>(vec2(390, 80));
+        if (callback) {
+            packpanel->listenAction([=](GUI*) {
+                callback(pack);
+            });
+        }
+        auto idlabel = std::make_shared<Label>("["+pack.id+"]");
+        idlabel->color(vec4(1, 1, 1, 0.5f));
+        packpanel->add(idlabel, vec2(360-idlabel->size().x, 2));
+
+        auto titlelabel = std::make_shared<Label>(pack.title);
+        packpanel->add(titlelabel, vec2(78, 6));
+
+        std::string icon = pack.id+".icon";
+        if (assets->getTexture(icon) == nullptr) {
+            auto iconfile = pack.folder/fs::path("icon.png");
+            if (fs::is_regular_file(iconfile)) {
+                assets->store(png::load_texture(iconfile), icon);
+            } else {
+                icon = "gui/no_icon";
+            }
+        }
+
+        if (!pack.creator.empty()) {
+            auto creatorlabel = std::make_shared<Label>("@"+pack.creator);
+            creatorlabel->color(vec4(0.8f, 1.0f, 0.9f, 0.7f));
+            packpanel->add(creatorlabel, vec2(360-creatorlabel->size().x, 60));
+        }
+
+        auto descriptionlabel = std::make_shared<Label>(pack.description);
+        descriptionlabel->color(vec4(1, 1, 1, 0.7f));
+        packpanel->add(descriptionlabel, vec2(80, 28));
+
+        packpanel->add(std::make_shared<Image>(icon, glm::vec2(64)), vec2(8));
+
+        packpanel->color(vec4(0.06f, 0.12f, 0.18f, 0.7f));
+        panel->add(packpanel);
+    }
+    if (backbutton)
+        panel->add(guiutil::backButton(engine->getGUI()->getMenu()));
+    return panel;
+}
+
+// TODO: refactor
 void create_content_panel(Engine* engine, PagesControl* menu) {
-    auto panel = create_page(engine, "content", 400, 0.0f, 5);
-    panel->add(new Label(L"work in progress"));
-    panel->add(guiutil::backButton(menu));
+    auto paths = engine->getPaths();
+    auto mainPanel = create_page(engine, "content", 400, 0.0f, 5);
+
+    std::vector<ContentPack> scanned;
+    ContentPack::scan(engine->getPaths(), scanned);
+    for (const auto& pack : engine->getContentPacks()) {
+        for (size_t i = 0; i < scanned.size(); i++) {
+            if (scanned[i].id == pack.id) {
+                scanned.erase(scanned.begin()+i);
+                i--;
+            }
+        }
+    }
+
+    auto panel = create_packs_panel(engine->getContentPacks(), engine, false, nullptr);
+    mainPanel->add(panel);
+    mainPanel->add(create_button(
+    langs::get(L"Add", L"content"), vec4(10.0f), vec4(1), [=](GUI* gui) {
+        auto panel = create_packs_panel(scanned, engine, true, 
+        [=](const ContentPack& pack) {
+            auto screen = dynamic_cast<LevelScreen*>(engine->getScreen().get());
+            auto level = screen->getLevel();
+            auto world = level->getWorld();
+
+            auto worldFolder = paths->getWorldFolder();
+            for (const auto& dependency : pack.dependencies) {
+                fs::path folder = ContentPack::findPack(paths, worldFolder, dependency);
+                if (!fs::is_directory(folder)) {
+                    guiutil::alert(gui, langs::get(L"error.dependency-not-found")+
+                                   L": "+util::str2wstr_utf8(dependency));
+                    return;
+                }
+                if (!world->hasPack(dependency)) {
+                    world->wfile->addPack(dependency);
+                }
+            }
+            
+            world->wfile->addPack(pack.id);
+
+            std::string wname = world->getName();
+            engine->setScreen(nullptr);
+            engine->setScreen(std::make_shared<MenuScreen>(engine));
+            open_world(wname, engine);
+        });
+        menu->add("content-packs", panel);
+        menu->set("content-packs");
+    }));
+    mainPanel->add(guiutil::backButton(menu));
 }
 
 inline uint64_t str2seed(std::wstring seedstr) {
@@ -476,7 +597,10 @@ void create_pause_panel(Engine* engine, PagesControl* menu) {
     panel->add(create_button(L"Continue", vec4(10.0f), vec4(1), [=](GUI*){
         menu->reset();
     }));
-    panel->add(guiutil::gotoButton(L"Content", "content", menu));
+    panel->add(create_button(L"Content", vec4(10.0f), vec4(1), [=](GUI*) {
+        create_content_panel(engine, menu);
+        menu->set("content");
+    }));
     panel->add(guiutil::gotoButton(L"Settings", "settings", menu));
 
     panel->add(create_button(L"Save and Quit to Menu", vec4(10.f), vec4(1), [=](GUI*){
@@ -493,7 +617,6 @@ void menus::create_menus(Engine* engine, PagesControl* menu) {
     create_controls_panel(engine, menu);
     create_pause_panel(engine, menu);
     create_languages_panel(engine, menu);
-    create_content_panel(engine, menu);
     create_main_menu_panel(engine, menu);
 }
 
diff --git a/src/frontend/screens.cpp b/src/frontend/screens.cpp
index 1d2b2732..76b37c08 100644
--- a/src/frontend/screens.cpp
+++ b/src/frontend/screens.cpp
@@ -104,6 +104,7 @@ LevelScreen::~LevelScreen() {
     auto world = level->getWorld();
     world->write(level.get());
     controller->onWorldQuit();
+    engine->getPaths()->setWorldFolder(fs::path());
 }
 
 void LevelScreen::updateHotkeys() {
@@ -163,3 +164,7 @@ void LevelScreen::draw(float delta) {
         }
     }
 }
+
+Level* LevelScreen::getLevel() const {
+    return level.get();
+}
diff --git a/src/frontend/screens.h b/src/frontend/screens.h
index 0cd0a297..631b0669 100644
--- a/src/frontend/screens.h
+++ b/src/frontend/screens.h
@@ -53,6 +53,8 @@ public:
 
     void update(float delta) override;
     void draw(float delta) override;
+
+    Level* getLevel() const;
 };
 
 #endif // FRONTEND_SCREENS_H_
diff --git a/src/objects/Player.cpp b/src/objects/Player.cpp
index 195d8619..d1689061 100644
--- a/src/objects/Player.cpp
+++ b/src/objects/Player.cpp
@@ -21,12 +21,13 @@ const float JUMP_FORCE = 8.0f;
 Player::Player(glm::vec3 position, float speed) :
 		speed(speed),
 		chosenSlot(0),
+		inventory(new Inventory(40)),
 	    camera(new Camera(position, glm::radians(90.0f))),
 	    spCamera(new Camera(position, glm::radians(90.0f))),
 	    tpCamera(new Camera(position, glm::radians(90.0f))),
         currentCamera(camera),
-	    hitbox(new Hitbox(position, glm::vec3(0.3f,0.9f,0.3f))),
-        inventory(new Inventory(40)) {
+	    hitbox(new Hitbox(position, glm::vec3(0.3f,0.9f,0.3f)))
+{
 }
 
 Player::~Player() {
diff --git a/src/objects/Player.h b/src/objects/Player.h
index cbe510ec..70822cd8 100644
--- a/src/objects/Player.h
+++ b/src/objects/Player.h
@@ -35,11 +35,11 @@ class Player {
     float speed;
     int chosenSlot;
     glm::vec3 spawnpoint {};
+    std::shared_ptr<Inventory> inventory;
 public:
     std::shared_ptr<Camera> camera, spCamera, tpCamera;
     std::shared_ptr<Camera> currentCamera;
     std::unique_ptr<Hitbox> hitbox;
-    std::shared_ptr<Inventory> inventory;
     bool flight = false;
     bool noclip = false;
     bool debug = false;
diff --git a/src/world/World.cpp b/src/world/World.cpp
index 5d1f03dd..29997e61 100644
--- a/src/world/World.cpp
+++ b/src/world/World.cpp
@@ -110,6 +110,14 @@ void World::setName(const std::string& name) {
     this->name = name;
 }
 
+bool World::hasPack(const std::string& id) const {
+    for (auto& pack : packs) {
+        if (pack.id == id)
+            return true;
+    }
+    return false;
+}
+
 void World::setSeed(uint64_t seed) {
     this->seed = seed;
 }
diff --git a/src/world/World.h b/src/world/World.h
index f3f22f0e..527e1ce4 100644
--- a/src/world/World.h
+++ b/src/world/World.h
@@ -70,6 +70,7 @@ public:
     void setName(const std::string& name);
     void setSeed(uint64_t seed);
     
+    bool hasPack(const std::string& id) const;
     std::string getName() const;
     uint64_t getSeed() const;
     const std::vector<ContentPack>& getPacks() const;