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Portal 2 PS3: Redeeming the PC copy - YouTube
How to Link & Play your Portal 2 PS3 Copy on Steam - Just Push Start
Portal 2 disc has CoD Black Ops on it. Did I buy a fake? : r/PS3
Co-Optimus - News - How to Play Portal 2 Split Screen on Your PC
Portal 2 on PS3 was the only Valve game on console to be cross play and cross progressions with PC via logging into steam on your PS3 and you'd get steam achievements +
Steam Community :: Guide :: How to play Local Co-op with Controller + Keyboard