A very efficient tutor.
For exploring cellular automata like Conway's Game of Life.
Zoomable user interface (ZUI) with file manager, file viewers and more
Action RPG that's easy to mod
Game library for Pascal
SDL based generic 2D game engine
Falling blocks puzzle game
Fast and robust map analyser for Brood War.
Web based Game server control panel
Articulated-body simulation engine written in C
ASCII based browser tower defense game
This is a hacking style game set in the early '80s
Zero version of a turn-based strategy/RPG game.
Free strategy browsergame engine.
Very Beta ASCII Text RPG (in perl)
TurboSphere is an easy to learn and powerful JS based game engine.
Type in chord progressions, and hear them played on guitar
collection of illustrative programs:small games, simulators: C, Matlab
Cross platform 2D game creation framework with Python bindings