A game framework written with osu! in mind.
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
Go bindings for raylib, a simple and easy-to-use library
A modern, cross-platform Quake game engine based on FitzQuake.
GemRB is a portable open-source implementation of the Infinity Engine
Game engine supporting many 3D/2D formats and graphic effects
The world is no longer the same
Orx: Portable Game Engine
Vivid3D is an open-source 3D engine with powerful 2D UI.
A fork of Chocolate Doom with small Quality of Life enhancements
A fork of dhewm3 with an emphasis on modernisation and vanilla Doom 3
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Vivid is a modern C++ 3D engine using OpenGL4+
Go 3D Game Engine
DOOM / Heretic / Hexen source port with enhanced graphics and UI
2D Game Engine
A cross platform Lua based game engine
Low-Level Game Engine for Retro Platforms