Fast and lightweight JavaScript game engine built on WebGL and glTF
fheroes2 is a recreation of Heroes of Might and Magic II game engine
Magic Another Game Engine
Solar2D Game Engine main repository (ex Corona SDK)
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
A game framework written with osu! in mind.
Svelto ECS C# Entity Component System
Animation Compression Library
Open Source real-time strategy game engine for early Westwood games
Embeddable unity game engine view for Flutter
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
Game engine to build text adventures.
Javascript library for making tile based games
RTSish Game Engine
Free and Open Game Programming Language for Windows and GNU/Linux
Game engine for playing tomb raider 1 - 5 levels.
A space race game in the style of A Dark Room
Community-driven game engine
Multi-platform game engine similar to old Megaman with a stage editor
Paintown is a 2d fighting game engine.