Xenogeddon is a free open-source FPS. You are the leader of a squad of Space Marine Terminators, and must investigate an abandoned ship. Your mission is to activate the self-destruct and then escape.
Please note that at the moment it is in beta.
I use JMonkeyEngine for the 3D. All model credits are contained in the text files in the relevent directory.
Please let me know what you think!