Command & Conquer Generals: Zero Hour Unload on your enemies with an all-new, hi-tech arsenal-new armies. Bring the next level of military sophistication to the battlefield. Wild new missions taken from the headlines -- Destroy a fleet in the Mediterranean, root out a splinter cell in Cairo, infiltrate a U.S. intelligence building and more Massive arsenal of new units, new structures, and microwave, laser, and satellite technology All-new Combat School feature tracks your stats and provides post-mission analysis, to improve your battle strategy This is an add on to Command & Conquer. You must have that game installed in order to play Zero Hour.