City Interactive is working on an addon for its Terrorist Takedown action game, Payback. Scheduled for an April release, Terrorist Takedown: Payback is a standalone expansion pack in which the player once againtakes on the role of GIs fighting against terrorrism. The expansion incorporates various gameplay improvements over the original title and adds 10 new missions, and lets you fly AH 64-Apache, control the .50 caliber humvee machine gun, or take aim with an antitank cannon.