CTFs as you need them
Arianne is an engine to develop multiplayer online games like Stendhal
An isometric arcade-style game of skill, puzzles and exploration
A game engine written in the D programming language
Cross-platform reimplementation of AMOS BASIC (runtime)
The classic intelligent role playing game
Create your own online real-time browser-based MMO in your website
AMOS BASIC reimplementation in Java