Paranautical Activity combines the classic FPS action of games like Doom and Quake, with the randomness and difficulty of modern roguelikes like Binding of Isaac and Spelunky. It's available now on Desura for $9.99. Buying the beta get's you all future updates for the game, as well as the full game when it comes out. Visit our webstite at CodeAvarice.com to stay up to date on upcoming patches, and the latest developments.
The game itself is a work in progress, and it's constantly getting updated, it has everything a good rougelike should, and it's controls are fluid. Everything seems relatively balanced and it's generally great fun!