Counter-Strike: Condition Zero Steam pre-orders start today and include a special offer for Counter-Strike players. If you already have Steam and wish to pre-order your copy, just double-click on Counter-Strike: Condition Zero in the "Coming Soon" section of your 'My Games' list. If you don't have Steam, install it today. Those who pre-order their copy on Steam can start playing the minute the game is released. For more information, please visit the SteamPowered website.