What's the factor which gives Half-Life Counterstrike it's long replay value?

Philippines
April 20, 2007 12:08am CST
It's been quite a while since the Counterstrike have come out, and even until now, the game is still as addictive and kick-butt, you just can't seem to have enough. What do you think gives Half-life Counterstrike it's replay value?
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