There's only so much zombie slaughter one can engage in before dispatching the undead loses its luster, wouldn't you say? That's why Activision is looking to shake things up for its undead murder sim, Call of Duty: World at War: Zombies on iPhone.

IGN reports Shi No Numa will add the Zombie Swamp map to the game -- one of Call of Duty: World at War's maps. In Zombie Swamp, players will get access to new weapons (the Arisaka, Type 100 machine gun and the Wunderwaffe DG-2) and take on new enemies: Japanese soldiers and Hellhounds.

This is the second expansion released for Call of Duty: Zombies, joining the currently available Verruckt map pack. Current owners will be able to download Shi No Numa at the end of this week for $4.99 from the App Store. If you have yet to download the game at all, you can purchase Call of Duty: Zombies for the usual price of $9.99 with Shi No Numa already loaded.

This article was originally published on Joystiq.

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