Portable version of the incredible Godot Game Engine
dhewm 3 main repository
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Orx: Portable Game Engine
Rust library to create a Good Game Easily
GemRB is a portable open-source implementation of the Infinity Engine
Game engine supporting many 3D/2D formats and graphic effects
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Low-Level Game Engine for Retro Platforms
Portable game engine with main focus on point-and-click adventures
lightweight multi platform game engine
scriptable game engine with built-in support for 2D graphics and sound
Multi-platform game engine similar to old Megaman with a stage editor
Paintown is a 2d fighting game engine.
A generic 2D engine for any kind of game
Point-and-click 2D game engine