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.

-Unique FPS/Roguelike combination

-Procedurally generated levels

-Impossibly fast gameplay

-Hidden levels

-Over 100 items

-40+ enemies

-Ridiculous bosses‏

-Kick ass Dubstep soundtrack

The Deluxe Atonement Edition includes the following

-Developer footage & commentary, from prototype to pre alpha to full release!

-The Seafarers Guide; A pro guide with a nautical twist. Consult the pro guide to become the leanest, baddest, mostest bestest Paranautical Activity player you can be.

-1 new level type, 1 new weapon and 1 new item.

-Wallpapers baby!