Fullmoon is a 3D, team-based, multiplayer, first person shooter with a survival horror theme. The game is a modification for the Source engine on PC. There are two teams: Soldiers and Werewolves. Soldiers are equipped with firearms and explosives which do not injure the Werewolves but do impede and slow them down. Werewolves are armed only with their claws and teeth which are deadly to the Soldiers. The levels are set in a range of outdoor and indoor atmospheric environments during the dead of night on a full moon.
You can find the rest of the new images, as well as read more about the mod, at their official site, or their ModDB page.