Users Playing this game are also playing:

Doom
Doom
Doom 3
Doom 3
The Ultimate Doom
The Ultimate Doom
Fallout 3
Fallout 3
Starcraft
Starcraft

Users who own this game also own:

Half-Life 2
Half-Life 2
Portal
Portal
Half-Life
Half-Life
Portal 2
Portal 2
Left 4 Dead 2
Left 4 Dead 2

Users who love this game also love:

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Super Mario World
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The Legend of Zelda: Ocarina of Time
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Super Mario Bros.
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Quake
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Super Metroid