How about a fan-made Oddworld MMORPG using
http://manasource.org/? (I'm slightly involved in the game-side of this project, which recently split into two; the game and the source. The game's site can be found here:
http://themanaworld.org/. I've done a bit of pixel-art for it and am working on more).
Anyway, we can use the ManaSource platform to make an Oddworld game, with three races: Mudokon, Gabbit and Slig. For monsters: Scrab, Paramite, Fleech, and so on. There could be some fancy equipment for Mudokons, not much for Gabbits (but they alone can enter special underwater maps) and not much for Sligs, either. For weapons: Club, Spoocebow, various Slig guns...
~we could make this.
Enchilado