Open-source game-engine software
901 open-source libraries, tools and applications tagged game-engine, ranked by how closely game-engine is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
901 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| Godot Engine Godot Engine is a free, open‑source, cross‑platform 2D and 3D game engine written in C++. It provides a full editor, scripting languages, a… | 97 | 118407 | stable |
| three.js three.js is a lightweight, general-purpose JavaScript 3D library for the web, providing scene graphs, cameras, materials, lights, loaders, … | 94 | 116214 | stable |
| Bevy Bevy is a free, open-source, data-driven game engine and app framework written in Rust, built around a custom Entity Component System (ECS)… | 91 | 48687 | active |
| Phaser Phaser is a fast, free, open-source 2D HTML5 game framework supporting Canvas and WebGL rendering in desktop and mobile web browsers. It is… | 86 | 40358 | active |
| raysan5/raylib raylib is a simple, lightweight C library for creating video games and graphical applications. It provides a clean API for OpenGL rendering… | 78 | 34866 | active |
| ValveSoftware/Proton Proton is a compatibility tool for Steam Play, based on Wine and additional components, that lets Windows-exclusive games run on Linux thro… | 100 | 33090 | active |
| Mindustry Mindustry is an open-source sandbox tower-defense and real-time strategy game written in Java, featuring resource automation, factory build… | 99 | 29401 | active |
| GDevelop GDevelop is an open-source, no-code 2D/3D game engine with a visual event-based system, built-in behaviors, multiplayer support, and AI ass… | 95 | 27625 | stable |
| Babylon.js Babylon.js is an open-source 3D engine written in TypeScript that runs in browsers and native environments. It provides a full-featured ren… | 94 | 26140 | active |
| Babylon.js Babylon.js is an open-source 3D game and rendering engine for the web, written in TypeScript and built on WebGL, WebGPU, and Web Audio. It … | 94 | 26140 | stable |
| libgdx/libgdx libGDX is a cross‑platform Java game development framework that abstracts OpenGL (ES) for Windows, Linux, macOS, Android, iOS, and HTML5. I… | 84 | 25454 | active |
| Matter.js Matter.js is a 2D rigid body physics engine written in JavaScript for the web. It simulates bodies, collisions, constraints, and composites… | 76 | 18482 | stable |
| wgpu wgpu is a cross-platform, safe, pure-Rust graphics API based on the WebGPU standard. It runs natively on Vulkan, Metal, D3D12, and OpenGL, … | 97 | 18311 | stable |
| kitao/pyxel Pyxel is a retro game engine for Python with simple, console-inspired specifications such as 16 colors and 4 sound channels, implemented in… | 90 | 17872 | stable |
| OpenEmu OpenEmu is an open-source retro video game emulator for macOS that unifies multiple emulation engine backends behind a native Cocoa front e… | 41 | 17787 | active |
| A-Frame A-Frame is an open-source web framework for building 3D, AR, and VR experiences in the browser using HTML and an entity-component-system ar… | 76 | 17646 | stable |
| bgfx bgfx is a cross-platform, graphics API agnostic rendering library in C++ that abstracts over backends like Direct3D 11/12, Vulkan, Metal, O… | 77 | 17566 | stable |
| OpenRA OpenRA is a free, open-source real-time strategy game engine written in C# using SDL and OpenGL that recreates and modernizes classic Westw… | 76 | 17420 | active |
| playcanvas/engine PlayCanvas Engine is an open-source JavaScript game engine and web graphics runtime built on WebGL2, WebGPU, and WebXR, with glTF support a… | 93 | 16945 | stable |
| Simple DirectMedia Layer Simple DirectMedia Layer (SDL) is a cross-platform C library providing low-level access to audio, keyboard, mouse, joystick, and graphics h… | 99 | 16836 | stable |
| official-stockfish/Stockfish Stockfish is a free, open-source UCI chess engine that analyzes positions and computes optimal moves using alpha-beta search with NNUE neur… | 85 | 16704 | active |
| OpenRCT2 OpenRCT2 is an open-source re-implementation of RollerCoaster Tycoon 2, a construction and management simulation game about running amuseme… | 96 | 16250 | active |
| glfw/glfw GLFW is a multi-platform C library for creating windows, OpenGL/OpenGL ES contexts and Vulkan surfaces, and handling input and events. It p… | 79 | 15398 | stable |
| MonoGame MonoGame is an open-source C#/.NET framework for building cross-platform games, re-implementing Microsoft's discontinued XNA Framework. It … | 95 | 14502 | stable |
| luanti-org/luanti Luanti (formerly Minetest) is a free open-source voxel game engine and game-creation platform with easy modding via Lua. It ships as a play… | 93 | 13751 | active |
| hajimehoshi/ebiten Ebitengine (formerly Ebiten) is an open-source 2D game engine for Go with a simple image-based drawing API. It supports desktop, mobile, we… | 100 | 13565 | stable |
| skypjack/entt EnTT is a header-only, dependency-free C++17/20 entity component system (ECS) library for game programming and other data-oriented applicat… | 83 | 13150 | stable |
| PaperMC/Paper Paper is a high-performance Minecraft: Java Edition server based on Spigot that fixes gameplay and mechanics inconsistencies while greatly … | 77 | 12723 | active |
| boardgameio/boardgame.io boardgame.io is an open-source JavaScript/TypeScript engine for building turn-based games. Developers write simple move functions and the f… | 75 | 12458 | stable |
| Jolt Physics Jolt Physics is a multicore-friendly rigid body physics and collision detection library written in C++. It is designed for games and VR app… | 86 | 11762 | stable |
| yairm210/Unciv Unciv is an open-source, moddable remake of Civilization V built with Kotlin and LibGDX, playable on Android and desktop platforms. It offe… | 94 | 11389 | active |
| stenzek/duckstation DuckStation is a fast, accurate PlayStation 1 (PSX) emulator for x86-64, AArch32/AArch64, and RISC-V platforms. It ships a Qt frontend plus… | 99 | 10823 | active |
| TrinityCore/TrinityCore TrinityCore is an open-source C++ MMORPG server framework derived from MaNGOS, implementing game server logic for World of Warcraft client … | 97 | 10800 | active |
| Flame Flame is an open-source 2D game engine built on top of Flutter, providing a game loop, component system, collision detection, effects, part… | 99 | 10787 | active |
| erincatto/box2d Box2D is a widely used open-source 2D rigid body physics engine for games, written in portable C17 with a data-oriented design, multithread… | 74 | 10413 | stable |
| egametang/ET ET is a C# game development framework combining a Unity3D client with a distributed C# game server, built around a fiber-based actor model … | 73 | 9927 | active |
| Cocos (Cocos Creator Engine) Cocos Engine is the open-source runtime engine behind Cocos Creator, a free cross-platform 2D/3D game development tool built with a C++ cor… | 75 | 9852 | stable |
| diasurgical/DevilutionX DevilutionX is an open-source port of Diablo and Hellfire that runs the classic game on modern operating systems with engine improvements, … | 70 | 9820 | active |
| Open 3D Engine (O3DE) Open 3D Engine (O3DE) is an Apache 2.0-licensed, multi-platform 3D game engine for building AAA games, cinema-quality 3D worlds, and high-f… | 88 | 9739 | active |
| Fyrox Fyrox is a feature-rich, general-purpose 2D and 3D game engine written in Rust, formerly known as rg3d. It includes a scene editor, GUI sys… | 80 | 9594 | active |
| chrismaltby/gb-studio GB Studio is a drag-and-drop visual game creator for making Game Boy games without programming knowledge, built as an Electron desktop app … | 93 | 9418 | active |
| AzerothCore AzerothCore is an open-source, modular MMO server emulator for World of Warcraft (WotLK 3.3.5a), built on MaNGOS, TrinityCore, and SunwellC… | 68 | 9065 | active |
| diasurgical/devilution Devilution is a reconstructed version of the original Diablo (1996) game source code, reverse-engineered from leaked symbol files and debug… | 38 | 8999 | active |
| jynew/jynew An open-source wuxia RPG game framework built in Unity as a tribute to the classic Heroes of Jin Yong, with full modding support and 10+ ho… | 52 | 8982 | stable |
| pygame/pygame Pygame is a free and open-source cross-platform Python library for building multimedia applications such as video games, built on top of th… | 41 | 8947 | stable |
| LÖVE LÖVE is a free, open-source 2D game framework for Lua (LuaJIT), written in C++. It provides APIs for graphics, audio, input, and physics, l… | 66 | 8850 | stable |
| SanderMertens/flecs Flecs is a fast, lightweight Entity Component System (ECS) framework for C99 and C++17 that enables building games and simulations with mil… | 90 | 8755 | stable |
| codecombat/codecombat CodeCombat is an open-source multiplayer programming game where players learn to code in Python and JavaScript by playing through browser-b… | 77 | 8571 | active |
| OpenTTD/OpenTTD OpenTTD is an open-source transport simulation game based on Transport Tycoon Deluxe, written in C++. It extends the original game with lar… | 88 | 8323 | stable |
| Azahar Azahar is an open-source Nintendo 3DS emulator based on Citra, created by merging PabloMK7's Citra fork with Lime3DS after Citra was discon… | 92 | 8292 | active |
| recastnavigation/recastnavigation Recast Navigation is an industry-standard C++ toolset for generating navigation meshes from level geometry and performing runtime pathfindi… | 50 | 7935 | stable |
| stride3d/stride Stride (formerly Xenko) is a free, open-source, cross-platform C# game engine for building 2D and 3D games, VR experiences, and interactive… | 100 | 7885 | active |
| Entitas Entitas is a fast Entity Component System (ECS) framework built specifically for C# and Unity, optimized for garbage-collected environments… | 23 | 7677 | stable |
| Endless Sky Endless Sky is a free, open-source 2D space exploration, trading, and combat game inspired by Escape Velocity and Elite. Players captain a … | 85 | 7628 | active |
| Veloren Veloren is an open-source, multiplayer voxel action-adventure RPG inspired by Cube World, Dwarf Fortress, and Breath of the Wild. It featur… | 66 | 7592 | active |
| mgba-emu/mgba mGBA is a fast and highly accurate emulator for Game Boy Advance games, with additional support for Game Boy and Game Boy Color titles. It … | 75 | 7511 | active |
| Zelda64Recomp/Zelda64Recomp Zelda 64: Recompiled is a static recompilation of The Legend of Zelda: Majora's Mask (with Ocarina of Time planned) into a native PC port, … | 69 | 7341 | active |
| Wicked Engine Wicked Engine is an open-source C++ 3D game engine with modern graphics features like ray tracing, global illumination, and physically base… | 96 | 7258 | active |
| htdt/godogen A generator that publishes thin game repos where AI coding agents (Claude Code or Codex) autonomously build complete games for Godot 4, Bev… | 60 | 7137 | active |
| Flax Engine Flax Engine is a modern, multi-platform 3D game engine written in C++ and C# with full source code available. It provides an editor, real-t… | 80 | 7050 | active |
| wesnoth/wesnoth The Battle for Wesnoth is an open-source, turn-based tactical strategy game with a high fantasy theme, featuring singleplayer campaigns and… | 77 | 6930 | stable |
| Ren'Py Ren'Py is an open-source visual novel engine that lets creators build interactive stories using words, images, and sounds, combining an eas… | 92 | 6904 | active |
| BoomingTech/Piccolo Piccolo (formerly Pilot) is a small open-source C++ game engine built for the GAMES104 course. It includes a Vulkan-based renderer, physics… | 23 | 6727 | active |
| OpenMW/openmw OpenMW is an open-source, cross-platform game engine that reimplements the Morrowind engine, allowing players to run The Elder Scrolls III:… | 85 | 6629 | active |
| Shattered Pixel Dungeon Shattered Pixel Dungeon is an open-source traditional roguelike dungeon crawler RPG with randomized levels, enemies, and hundreds of items,… | 90 | 6618 | active |
| erincatto/box3d Box3D is a 3D rigid body physics engine for games, written in portable C17 with a data-oriented design. It provides collision detection, jo… | 65 | 6587 | active |
| s&box s&box is a modern game engine built on Valve's Source 2 and .NET, with an intuitive editor for creating games. This repository contains the… | 61 | 6488 | active |
| JSNES JSNES is a Nintendo Entertainment System (NES) emulator written in JavaScript, distributed as a library usable in both the browser and Node… | 85 | 6419 | active |
| melonjs/melonJS melonJS is an open-source, MIT-licensed 2D/2.5D HTML5 game engine for indie developers, built with ES6 classes and TypeScript support. It p… | 100 | 6414 | active |
| Defold Defold is a free, source-available, cross-platform game engine for building 2D and lightweight 3D games for desktop, mobile, web, and conso… | 98 | 6357 | active |
| Mirror Networking Mirror is the most popular free open-source networking library for Unity, forked from Unity's deprecated UNET HLAPI and battle-tested since… | 92 | 6335 | stable |
| rust-windowing/winit winit is a cross-platform window creation and management library written in pure Rust. It provides a unified API for creating windows and h… | 84 | 6205 | active |
| Redot Engine Redot Engine is a free, open-source, community-driven fork of Godot for building 2D and 3D games from a unified node-based editor. It suppo… | 91 | 6136 | active |
| nesbox/TIC-80 TIC-80 is a free, open-source fantasy computer for making, playing, and sharing tiny retro games. It bundles code, sprite, map, and sound e… | 85 | 6135 | active |
| dialogic-godot/dialogic Dialogic 2 is a Godot 4.5+ plugin for creating in-game dialogs, visual novels, and RPGs with a visual timeline editor and character managem… | 83 | 6054 | active |
| Pokémon Showdown Pokémon Showdown is a Pokémon battle simulator that runs as a website, a self-hostable game server, and a JavaScript library for simulating… | 84 | 5976 | active |
| vcmi/vcmi VCMI is an open-source, from-scratch reimplementation of the Heroes of Might and Magic III game engine, licensed under GPL-2.0. It uses the… | 95 | 5909 | active |
| Galacean Engine Galacean Engine is a high-performance, real-time interactive 2D/3D engine written in TypeScript, built on WebGL/WebGL2 with support for ani… | 84 | 5901 | active |
| KhronosGroup/MoltenVK MoltenVK is a layered implementation of the Vulkan 1.4 graphics and compute API built on top of Apple's Metal framework, enabling Vulkan ap… | 95 | 5892 | active |
| Rapier Rapier is a set of high-performance 2D and 3D physics engines written in Rust, providing rigid-body dynamics, joint constraints, collision … | 77 | 5848 | stable |
| CaffeineMC/sodium Sodium is a high-performance rendering engine replacement and optimization mod for the Minecraft client. It significantly improves frame ra… | 97 | 5802 | active |
| tModLoader/tModLoader tModLoader is an open-source, community-driven modding API and mod loader for the game Terraria, distributed as a free Steam app. It lets p… | 98 | 5703 | active |
| ConfettiFX/The-Forge The Forge is a cross-platform rendering and game framework written in C++, supporting Windows (DirectX 12/DXR), macOS/iOS (Metal), Android,… | 75 | 5680 | active |
| HarbourMasters/Shipwright Ship of Harkinian (SOH) is a cross-platform PC port of The Legend of Zelda: Ocarina of Time built on the libultraship library and the OOT d… | 99 | 5624 | active |
| TwilitRealm/dusklight Dusklight is a reverse-engineered, open-source reimplementation of The Legend of Zelda: Twilight Princess that runs the game natively on PC… | 82 | 5600 | active |
| google-deepmind/open_spiel OpenSpiel is a collection of game environments and reinforcement learning/search/planning algorithms for research in general RL and multiag… | 93 | 5537 | active |
| liangxiegame/QFramework QFramework is a lightweight (under 1000 lines of core code) system design architecture and game development framework for Unity and Godot, … | 81 | 5487 | active |
| Cuberite Cuberite is a lightweight, fast, and extensible Minecraft-compatible multiplayer game server written in C++ with a flexible Lua plugin API.… | 55 | 5453 | active |
| CharlesPikachu/Games A collection of classic 2D mini-games (tank war, flappy bird, puzzle, ski, etc.) implemented in pure Python with pygame, published as the c… | 23 | 5421 | active |
| supertuxkart/stk-code SuperTuxKart is a free, open-source 3D kart racing game focused on fun rather than realistic physics, with single-player and online multipl… | 68 | 5380 | active |
| The-Powder-Toy/The-Powder-Toy The Powder Toy is a free, open-source falling-sand physics sandbox game written in C++ with SDL, simulating air pressure, velocity, heat, a… | 91 | 5336 | active |
| Spine Official runtime libraries for loading and rendering Spine 2D skeletal animation data in game engines and toolkits across many languages. T… | 77 | 5314 | stable |
| godot-rust (gdnative) gdext provides Rust bindings for the Godot 4 game engine, letting developers write game logic and engine extensions in Rust via GDExtension… | 95 | 5295 | active |
| piqnt/planck.js Planck.js is a JavaScript/TypeScript rewrite of the Box2D 2D rigid-body physics engine, designed for cross-platform HTML5 game development.… | 75 | 5284 | active |
| dotnet/Silk.NET Silk.NET is a .NET library providing high-performance bindings to low-level graphics, compute, audio, and multimedia APIs such as OpenGL, V… | 75 | 5238 | active |
| Panda3D Panda3D is a mature, open-source cross-platform game engine and 3D rendering framework for Python and C++, originally developed by Disney a… | 67 | 5227 | stable |
| Baekalfen/PyBoy PyBoy is a Game Boy and Game Boy Color emulator written in Python, usable both as a standalone terminal application and as an embeddable Py… | 94 | 5217 | active |
| Magnum Magnum is a lightweight and modular C++11/C++14 graphics middleware library providing a slim wrapper over OpenGL, OpenGL ES, WebGL and Vulk… | 64 | 5208 | stable |
| Unleashed Recompiled An unofficial PC port of the Xbox 360 version of Sonic Unleashed built via static recompilation of the original PowerPC code into native C+… | 62 | 5190 | active |
| libnoname/noname Noname (无名杀) is an open-source, cross-platform implementation of the Sanguosha / Three Kingdoms Kill card game, playable on Android, PC, an… | 95 | 5162 | active |
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