Free download : Alien world game

You play a space marine who is dropped in to a series of unfamiliar alien worlds to fight for the survival of your race with a huge arsenal of apocalyptic weapons at your disposal. The ability of the game engine to freely mix outdoor and indoor environments (such as tunnels, underground bases, ruined cities etc.) creates a beautiful world for the player to explore and destroy! Features include: 3D graphics engine, 20 levels, Bump-mapping, DirectSound 3D and EAX support, and two-player co-operative mode.