The Zeus Exclusion X4 is a powerful tower in SAS Zombie Assault Tower Defense. It has a gatling gun on each corner of the tower. In order to obtain it, the player must upgrade the Area Denial Weapon System before being given the option for an upgrade to the Zeus Exclusion X4, which costs $3,500.
These towers can kill a large amount of zombies, assuming that the player keeps special zombies from attacking them.
Large groups of these towers can handle most zombies, except for the Ruin and a few dozen Mamushka.