Dig out your gas masks, because Frima Studio’s undead strategy title Zombie Tycoon 2: Brainhov’s Revenge represents this week’s big new addition to the Instant Game Collection. PlayStation Plus subscribers in North America will be able to download the PlayStation 3 and Vita versions of the title without spending a penny, and subsequently will be given the option to engage in a spot of undead warfare in the idyllic suburban setting of, er, Finkleville.

In addition to the freebie, this week will also see the conclusion of Spring Fever – and Sony’s celebrating in style. The platform holder’s launching a PlayStation All-Stars Battle Royale-themed sale, which not only sees the mascot up mash-up’s price slashed to $19.59, but also includes discounts on various titles featuring the characters from its roster. Highlights include the God of War Collection for $14.69, LittleBigPlanet Vita for $17.49, and inFAMOUS: Festival of Blood for $4.89. Point your browser through here for the full details.

Are you satisfied or sad? As always, let us know in the comments section below.

[via blog.us.playstation.com]