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Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.
3D and 2D game engine written in Rust
🐍🎮 pygame (the library) is a Free and Open Source python programming language library for making multimedia applications like games built on top of the excellent SDL library. C, Python, Native, OpenGL.
JinYongLegend-like RPG Game Framework with full Modding support and 10+ hours playable samples of game.
LÖVE is an awesome 2D game framework for Lua.
A fast entity component system (ECS) for C & C++
Industry-standard navigation-mesh toolset for games
Stride (formerly Xenko), a free and open-source cross-platform C# game engine.
Space exploration, trading, and combat game.
Entitas is a super fast Entity Component System (ECS) Framework specifically made for C# and Unity
Flax Engine – multi-platform 3D game engine
shapez is an open source base building game on Steam inspired by factorio!
This is literally a game framework, based on Unity game engine. It encapsulates commonly used game modules during development, and, to a large degree, standardises the process, enhances the development speed and ensures the product quality.
Shattered Pixel Dungeon is an open-source traditional roguelike dungeon crawler with randomized levels and enemies, and hundreds of items to collect and use. It's based on the source code of Pixel Dungeon, by Watabou.
Piccolo (formerly Pilot) – mini game engine for games104
A modern & fully featured HTML5 game engine (2D & 3D) for JavaScript/TypeScript, with WebGL/WebGPU rendering, built-in physics, Tiled map & glTF support and WebAudio.
Defold is a completely free to use game engine for development of desktop, console, mobile and web games.
Redot Engine – Multi-platform 2D and 3D game engine
A Cross-end HTML5 Game development solution
Godot Engine official documentation
Games: Create interesting games in pure python.
2D JavaScript Physics Engine
Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU
Adds AMD FSR 3 Frame Generation to games by replacing Nvidia DLSS Frame Generation (nvngx_dlssg).