RPG Maker 2000/2003 and EasyRPG games interpreter
A retro game engine for Python
Recreation of the classic Grand Theft Auto III game executable
3D game engine/framework in C, with Luajit and Python bindings now
High performance UI layout library in C
The Tiny JavaScript Game Engine That Can!
Open source library for creative expression on the web, desktop, etc.
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
Haskell game engine library for roguelike dungeon crawlers
Rust library to create a Good Game Easily
A simple math library for games and computer graphics
A game engine for console based text games
A fork of dhewm3 with an emphasis on modernisation and vanilla Doom 3
A cross platform Lua based game engine
Planimeter Game Engine 2D - LÖVE-based game engine for Lua
A space race game in the style of A Dark Room
A generic 2D engine for any kind of game
TurboSphere is an easy to learn and powerful JS based game engine.
Cross-platform 2D game engine
A 2D Java game engine