There's not many games that we've played that manage to capture the feel of the movie Aliens so well, but this one definitely does it. Derelict is a tactical shooter where you control 4 marines and a CO against a horde of continually spawning mutants. The graphics are not the best, but the art design makes it irrelevant, thanks to the nice textures and spooky atmosphere. Sounds, music, controls, and concept are all wonderfully realized. There are 20 levels in the final game, and there's even a level editor for you to make your own levels to distribute. At about 37 megabytes, it's worth it for any fan of the movie Aliens or the game Space Hulk.

[Via IndieGames]