
I didn't play CSCO but VALVe's attitude of removing it is a SHAME! - My Truth (WHAT I SAY BELOW MAY NOT BE TRUE): The VALVe team only removes mods from fan-games/multiplayer so as not to compromise the loss of players who will not buy skins in their games (Deadlock, CS2, TF2, DotA 2) . In singleplayer (Half-Life/Portal), this doesn't happen (I could be wrong, but that's what I believe).