See here:

http://forum.freegamedev.net/viewtopic.php?f=24&t=5324

The assets are a from a really cool looking coop Zombie shooting FPS. However I am a bit doubtful if just "dumping" them will gather much interest.

Anyone (mainly a programmer) looking for a cool project to work on with a nearly complete set of art assets? I would suggest doing it as a mod to one of the established open-source engines.