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Portal 2' now available for PC, Xbox 360, PS3 | Digital Trends
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Xbox 360 Video Game Bundle: Lot of 3, Fallout 3, Portal 2, and Halo 4 | eBay
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Portal 2 Co-Op Hands-On - GameSpot
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Get custom bots with your Portal 2 pre-order at GameStop | VG247
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Portal 2 (for PC) Review | PCMag
