A fast, scalable, distributed game server engine/framework for C++, include the actor library, network library, can be used as a real time multiplayer game engine ( MMO RPG/MOBA ), which support C#/Lua script/ Unity3d, Cocos2dx and plan to support Unreal.
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Direct port of the Bullet physics engine to JavaScript using Emscripten
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SolidStart, the Solid app framework
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A modular, extendable, and easy-to-use physics engine for javascript
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A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once (Fork of MultiMC)
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Terasology - open source voxel world
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A complete 3-D game development suite written in Java.
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Animated sprite editor & pixel art tool -- Fork of the last GPLv2 commit of Aseprite
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Enjoy programming while playing a game.
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Drivers and libraries for the Xbox Kinect device on Windows, Linux, and OS X
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Open Broadcaster Software (Deprecated: See OBS Studio repository instead)
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Super tiny size multi-touch gestures library for the web. You can touch this →
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Unity3D System Design Architecture
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LÖVE is an awesome 2D game framework for Lua.
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A lightweight game engine written in modern C++
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Duelyst is a digital collectible card game and turn-based strategy hybrid, developed by Counterplay Games.
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scene-oriented, flexible 3D engine (C++, Python, C#, Java)
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Traditional roguelike game with pixel-art graphics and simple interface
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JavaScript Game Engine
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Open-source engine for Heroes of Might and Magic III
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play-games-plugin-for-unityby playgameservices
C# 
3237 Version:Current License: Proprietary (Proprietary)
Google Play Games plugin for Unity
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#1 Open Source Unity Networking Library
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Java / JavaFX / Kotlin Game Library (Engine)
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The multiplayer game engine
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Free Android 2D OpenGL Game Engine
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A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/
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Retro Games in Gym
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A lite library, you can make your project depend it easily, and your project will be UNDEAD (contains api from 9 to 23, lol).
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A server software for Minecraft: Bedrock Edition in PHP
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Deck of Cards (old version)
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3D C++ Game Engine - yet another open source game engine
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3D and 2D game engine written in Rust
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🔥 EasyFloat：浮窗从未如此简单（Android可拖拽悬浮窗口，支持页面过滤、自定义动画，可设置单页面浮窗、前台浮窗、全局浮窗，浮窗权限按需自动申请...）
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An Open Source Implementation of the Actor Model in C++
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The Atomic Game Engine is a multi-platform 2D and 3D engine with a consistent API in C++, C#, JavaScript, and TypeScript
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Tool that allows you to add more games to your NES/SNES Classic Mini
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A game for learning CSS grid layout 🥕
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The source code for the Cfx.re modification frameworks, such as FiveM, RedM and LibertyM, as well as FXServer.
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Third-person Survival Game for Unreal Engine 4 (Sample Project)
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Free Python Games
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An open source version of a game engine developed by Croteam for the classic Serious Sam games.
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Free open-source game cheat for Counter-Strike: Global Offensive, written in modern C++. GUI powered by Dear ImGui.
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if you are Thanos(root), this command could delete half your files randomly
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a simple PlantsVsZombies game
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Good Game, Peace Out Rollback Network SDK
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The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.
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Unity Node Editor: Lets you view and edit node graphs inside Unity
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NoahGameFrameby ketoo
A fast, scalable, distributed game server engine/framework for C++, include the actor library, network library, can be used as a real time multiplayer game engine ( MMO RPG/MOBA ), which support C#/Lua script/ Unity3d, Cocos2dx and plan to support Unreal.
C++ 3712Updated: 1 y ago License: Permissive (Apache-2.0)
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ammo.jsby kripken
Direct port of the Bullet physics engine to JavaScript using Emscripten
C++ 3627Updated: 12 mo ago License: Proprietary (Proprietary)
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A
AICommandby keijiro
ChatGPT integration with Unity Editor
C# 3558Updated: 11 mo ago License: Permissive (Unlicense)
3558Updated: 11 mo ago License: Permissive (Unlicense)Support
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solid-startby solidjs
SolidStart, the Solid app framework
TypeScript 3557Updated: 11 mo ago License: Permissive (MIT)
3557Updated: 11 mo ago License: Permissive (MIT)Support
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PhysicsJSby wellcaffeinated
A modular, extendable, and easy-to-use physics engine for javascript
JavaScript 3542Updated: 11 mo ago License: Permissive (MIT)
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PrismLauncherby PrismLauncher
A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once (Fork of MultiMC)
C++ 3541Updated: 11 mo ago License: Strong Copyleft (GPL-3.0)
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Terasologyby MovingBlocks
Terasology - open source voxel world
Java 3515Updated: 11 mo ago License: Permissive (Apache-2.0)
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j
jmonkeyengineby jMonkeyEngine
A complete 3-D game development suite written in Java.
Java 3436Updated: 11 mo ago License: Permissive (BSD-3-Clause)
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LibreSpriteby LibreSprite
Animated sprite editor & pixel art tool -- Fork of the last GPLv2 commit of Aseprite
C++ 3426Updated: 11 mo ago License: Strong Copyleft (GPL-2.0)
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ByteLegendby ByteLegend
Enjoy programming while playing a game.
Java 3424Updated: 11 mo ago License: Strong Copyleft (AGPL-3.0)
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libfreenectby OpenKinect
Drivers and libraries for the Xbox Kinect device on Windows, Linux, and OS X
C 3404Updated: 1 y ago
License: No License (No License)
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OBSby jp9000
Open Broadcaster Software (Deprecated: See OBS Studio repository instead)
C 3372Updated: 1 y ago License: Strong Copyleft (GPL-2.0)
3372Updated: 1 y ago License: Strong Copyleft (GPL-2.0)Support
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AlloyFingerby AlloyTeam
Super tiny size multi-touch gestures library for the web. You can touch this →
JavaScript 3361Updated: 11 mo ago License: Permissive (MIT)
3361Updated: 11 mo ago License: Permissive (MIT)Support
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QFrameworkby liangxiegame
Unity3D System Design Architecture
C# 3337Updated: 11 mo ago License: Permissive (MIT)
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l
loveby love2d
LÖVE is an awesome 2D game framework for Lua.
C++ 3313Updated: 11 mo ago License: Proprietary (Proprietary)
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halleyby amzeratul
A lightweight game engine written in modern C++
C++ 3310Updated: 11 mo ago License: Permissive (Apache-2.0)
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duelystby open-duelyst
Duelyst is a digital collectible card game and turn-based strategy hybrid, developed by Counterplay Games.
JavaScript 3308Updated: 12 mo ago License: Permissive (CC0-1.0)
3308Updated: 12 mo ago License: Permissive (CC0-1.0)Support
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ogreby OGRECave
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
C++ 3296Updated: 12 mo ago License: Permissive (MIT)
3296Updated: 12 mo ago License: Permissive (MIT)Support
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pixel-dungeonby watabou
Traditional roguelike game with pixel-art graphics and simple interface
Java 3278Updated: 1 y ago License: Strong Copyleft (GPL-3.0)
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C
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vcmiby vcmi
Open-source engine for Heroes of Might and Magic III
C++ 3245Updated: 11 mo ago License: Strong Copyleft (GPL-2.0)
3245Updated: 11 mo ago License: Strong Copyleft (GPL-2.0)Support
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play-games-plugin-for-unityby playgameservices
Google Play Games plugin for Unity
C# 3237Updated: 1 y ago License: Proprietary (Proprietary)
3237Updated: 1 y ago License: Proprietary (Proprietary)Support
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M
Mirrorby vis2k
#1 Open Source Unity Networking Library
C# 3211Updated: 2 y ago License: Permissive (MIT)
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F
FXGLby AlmasB
Java / JavaFX / Kotlin Game Library (Engine)
Java 3207Updated: 11 mo ago License: Permissive (MIT)
3207Updated: 11 mo ago License: Permissive (MIT)Support
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A
Ambientby AmbientRun
The multiplayer game engine
Rust 3172Updated: 11 mo ago License: Permissive (Apache-2.0)
3172Updated: 11 mo ago License: Permissive (Apache-2.0)Support
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A
AndEngineby nicolasgramlich
Free Android 2D OpenGL Game Engine
Java 3152Updated: 1 y ago License: Permissive (Apache-2.0)
3152Updated: 1 y ago License: Permissive (Apache-2.0)Support
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springby spring
A powerful free cross-platform RTS game engine. - Report issues at https://springrts.com/mantis/
C++ 3152Updated: 1 y ago License: Proprietary (Proprietary)
3152Updated: 1 y ago License: Proprietary (Proprietary)Support
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r
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MarsDaemonby Marswin
A lite library, you can make your project depend it easily, and your project will be UNDEAD (contains api from 9 to 23, lol).
Java 3078Updated: 11 mo ago License: Permissive (Apache-2.0)
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PocketMine-MPby pmmp
A server software for Minecraft: Bedrock Edition in PHP
PHP 3068Updated: 11 mo ago License: Weak Copyleft (LGPL-3.0)
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deck-of-cardsby deck-of-cards
Deck of Cards (old version)
JavaScript 3048Updated: 1 y ago License: Proprietary (Proprietary)
3048Updated: 1 y ago License: Proprietary (Proprietary)Support
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LumixEngineby nem0
3D C++ Game Engine - yet another open source game engine
C++ 3043Updated: 12 mo ago License: Permissive (MIT)
3043Updated: 12 mo ago License: Permissive (MIT)Support
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rg3dby rg3dengine
3D and 2D game engine written in Rust
Rust 2988Updated: 2 y ago License: Permissive (MIT)
2988Updated: 2 y ago License: Permissive (MIT)Support
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E
EasyFloatby princekin-f
🔥 EasyFloat：浮窗从未如此简单（Android可拖拽悬浮窗口，支持页面过滤、自定义动画，可设置单页面浮窗、前台浮窗、全局浮窗，浮窗权限按需自动申请...）
Kotlin 2959Updated: 11 mo ago License: Permissive (Apache-2.0)
2959Updated: 11 mo ago License: Permissive (Apache-2.0)Support
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a
actor-frameworkby actor-framework
An Open Source Implementation of the Actor Model in C++
C++ 2959Updated: 11 mo ago License: Permissive (BSD-3-Clause)
2959Updated: 11 mo ago License: Permissive (BSD-3-Clause)Support
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A
AtomicGameEngineby AtomicGameEngine
The Atomic Game Engine is a multi-platform 2D and 3D engine with a consistent API in C++, C#, JavaScript, and TypeScript
C++ 2949Updated: 11 mo ago License: Proprietary (Proprietary)
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Geographical-Adventuresby SebLague
C# 2936Updated: 12 mo ago License: Proprietary (Proprietary)
2936Updated: 12 mo ago License: Proprietary (Proprietary)Support
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h
hakchi2by ClusterM
Tool that allows you to add more games to your NES/SNES Classic Mini
C# 2918Updated: 1 y ago License: Strong Copyleft (GPL-3.0)
2918Updated: 1 y ago License: Strong Copyleft (GPL-3.0)Support
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gridgardenby thomaspark
A game for learning CSS grid layout 🥕
JavaScript 2890Updated: 11 mo ago License: Permissive (MIT)
2890Updated: 11 mo ago License: Permissive (MIT)Support
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f
fivemby citizenfx
The source code for the Cfx.re modification frameworks, such as FiveM, RedM and LibertyM, as well as FXServer.
C++ 2883Updated: 11 mo ago License: No License (No License)
2883Updated: 11 mo ago License: No License (No License)Support
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EpicSurvivalGameby tomlooman
Third-person Survival Game for Unreal Engine 4 (Sample Project)
C++ 2883Updated: 11 mo ago License: Permissive (MIT)
2883Updated: 11 mo ago License: Permissive (MIT)Support
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SpaceEngineersby KeenSoftwareHouse
C# 2877Updated: 1 y ago License: No License (No License)
2877Updated: 1 y ago License: No License (No License)Support
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free-python-gamesby grantjenks
Free Python Games
Python 2864Updated: 12 mo ago License: Proprietary (Proprietary)
2864Updated: 12 mo ago License: Proprietary (Proprietary)Support
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Serious-Engineby Croteam-official
An open source version of a game engine developed by Croteam for the classic Serious Sam games.
C++ 2864Updated: 1 y ago License: Strong Copyleft (GPL-2.0)
2864Updated: 1 y ago License: Strong Copyleft (GPL-2.0)Support
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Osirisby danielkrupinski
Free open-source game cheat for Counter-Strike: Global Offensive, written in modern C++. GUI powered by Dear ImGui.
C++ 2851Updated: 11 mo ago License: Permissive (MIT)
2851Updated: 11 mo ago License: Permissive (MIT)Support
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Thanos.shby hotvulcan
if you are Thanos(root), this command could delete half your files randomly
PowerShell 2839Updated: 11 mo ago License: Permissive (MIT)
2839Updated: 11 mo ago License: Permissive (MIT)Support
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PythonPlantsVsZombiesby marblexu
a simple PlantsVsZombies game
Python 2822Updated: 11 mo ago License: No License (No License)
2822Updated: 11 mo ago License: No License (No License)Support
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ggpoby pond3r
Good Game, Peace Out Rollback Network SDK
C++ 2822Updated: 11 mo ago License: Permissive (MIT)
2822Updated: 11 mo ago License: Permissive (MIT)Support
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opentkby opentk
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.
C# 2817Updated: 11 mo ago License: Proprietary (Proprietary)
2817Updated: 11 mo ago License: Proprietary (Proprietary)Support
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x
xNodeby Siccity
Unity Node Editor: Lets you view and edit node graphs inside Unity
C# 2811Updated: 11 mo ago License: Permissive (MIT)
2811Updated: 11 mo ago License: Permissive (MIT)Support
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