PC (Microsoft Windows)August 10, 2010
Released ✓ 
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Factum Solus
Factum Solus is a story driven episodic Portal mod. Player plays as Chell from the original Portal, but in a totally new exciting universe where the Aperture center is not controlled by GLaDOS but a AI called Ben.
Science fictionPuzzleShooter
Game modes
Single player
Player perspectives
First person