yes, you need HL2 to play this game. it's an HL2 mod, which i already said in
this post.
Chaoscode: that sucks man. i had CS already for a while, and i just went to steampowered.com, got a new account, bought HL2 silver, and honestly never had and problems with it.
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Dedicated to mediocrity and repetition since 1994.