It's a reskinned MW2, with better movement and no original maps. The weapon balance is terrible. The spawns are terrible. The carryover weapons might as well be nerf guns, and there are very limited new weapons. I got kicked for inactivity while playing a game. It's... just horrible. Don't waste your money, MW2 is far, far better. I'd be disappointed if this game was a free DLC for MW2, much less a "full" game. The only good thing is the maps, and they're literally 14 years old...
