Users Playing this game are also playing:

Fallout 3
Fallout 3
Left 4 Dead
Left 4 Dead
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F.E.A.R. Extraction Point
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Metal Gear Solid 4: Guns of the Patriots
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Borderlands

Users who own this game also own:

F.E.A.R.
F.E.A.R.
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Batman: Arkham Asylum
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F.E.A.R. Perseus Mandate
Portal
Portal

Users who love this game also love:

BioShock
BioShock
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Half-Life 2
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Half-Life
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Half-Life 2: Episode Two
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Portal 2