Open source simulation game based on Transport Tycoon Deluxe
A dead simple 2D game library for Go
Orx: Portable Game Engine
GemRB is a portable open-source implementation of the Infinity Engine
RTS game with the theme of Strategy by Design
Game engine supporting many 3D/2D formats and graphic effects
Arianne is an engine to develop multiplayer online games like Stendhal
Zoomable user interface (ZUI) with file manager, file viewers and more
Old style soccer game with many exciting features
jfCraft : Yet Another Minecraft Clone
Analysis of Oware (Abapa) games
open-source implementation of the "kropki" (aka "tochki") game
An SDL2 based maze-game.
2D Open Source MMORPG
DOOM / Heretic / Hexen source port with enhanced graphics and UI
portable o2em launcher
Low-Level Game Engine for Retro Platforms
Portable game engine with main focus on point-and-click adventures
SJCE - free portable cross-platform graphical chess game, 100% Java.
scriptable game engine with built-in support for 2D graphics and sound