Paranautical Activity the awesome looking FPS/Roguelike game from CodeAvarice is planning to add Co-Op multiplayer to jump in the game with friends! So this will make an already fun game far more awesome.
The game is available from them directly (the above link) or from Desura.
They are currently running a Kickstarter to gather funds to continue working and to get more exposure for their Steam greenlight campaign where they badly need votes due to all the crap that happened to them before.
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