Quote:
Originally Posted by Phoenixfencer
Okay, probably a stupid question. Do I have to have HL2 to play this or will any source engine game do cause I have portal.
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To play it you need one of the following games:
Left 4 Dead
Team Fortress 2
Counter-Strike: Source
Half-Life 2, Episode One or Episode Two
Half-Life 2: Deathmatch
Portal
Day of Defeat: Source