Alien Swarm is a new mod for UT2K3 that will pit Marines against swarms of, well, alien bugs and the like that have infested various colonies, bases and outposts, and will feature weapons like Assault Rifles, Heat Tracking Guns, Sentry Guns and Flamethrowers. Perhaps best of all, it will support co-op multiplayer gameplay.
Stop by their site for more info and media about Alien Swarm.
Stop by their site for more info and media about Alien Swarm.