Ai so stupid, the Ai team in the map need Auto Mod to use Their Skill. The Paid Unit ridiculous strong than other. The resource reward too little for the upgrade, cannot beat the high map, some characters have unique skill way too strong, the high level reward too little for the upgrade need to clear map, Unit don't follow user control, the weapon suck. Shotgun can knock down the Unit but cannot knock down the Big Wu Zhang and any special Unit (paid unit)... The admin delete bad comment.