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
Gorgon Game Engine (GGE) is a C++ game engine that handles many tasks.
A generic 2D engine for any kind of game
TurboSphere is an easy to learn and powerful JS based game engine.
Text Based Game Engine and Parser
Open source, moddable game engine for the "Polygon Love 2" game
Cross-platform 2D game engine