The listing, Paranautical Activity: Deluxe Atonement Ed. [Steam Key] has ended.
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!
More info: http://store.steampowered.com/app/250580/
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This game works on mac and linux too! Also includes steam trading cards
Good Luck!