Portal 2' was perfect - but can Valve pull it off again with 'Portal 3'?
Portal 2 - Closing the Xbox 360 Era in Style – Chit Hot
Buy Portal 2 | Xbox
Portal 2 | Graphics Comparison | Frame Rate | Side by Side - YouTube
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Red Dead Redemption, Portal 2, Gears of War 2 and more Xbox 360 classics will be Xbox One X enhanced - MSPoweruser
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Valve talks Portal 2 on PlayStation 3, Steam on 360 | Ars Technica
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Portal (video game) - Wikipedia
Device Portal for Xbox - UWP applications | Microsoft Learn
Xbox 360 Video Game Bundle: Lot of 3, Fallout 3, Portal 2, and Halo 4 | eBay
Here Are The New Xbox One Backward Compatibility Titles Playable Today - Xbox Wire
Portal, Halo: Reach, Fable 3 get Xbox One back compatibility | Eurogamer.net
Portal 3 | Video Game Fanon Wiki | Fandom
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Stallion on Twitter: "September Games with Gold Portal 2 will be the final Xbox 360 game offered on the service. A GREAT final selection. #Xbox https://t.co/kr6oT6cSkH" / Twitter
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Portal 2 | PS3 vs XBOX 360 vs PC (Which One is Better!) - YouTube