No revenue estimate for PSN — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $13.7M — a different platform, not this one.

World War Z

Humanity is on the brink of extinction. From New York to Moscow and Jerusalem, the undead apocalypse continues to spread. As the end looms, a hardened few band together to defeat the horde and outlive the dead. World War Z is a heart-pounding coop third-person shooter featuring swarms of hundreds of zombies. Based on the Paramount Pictures film, World War Z focuses on fast-paced gameplay while exploring new storylines from around the world. Battle swarms of hundreds of zombies – the Swarm Engine™ seamlessly renders hordes of zombies in incredible firefights. Advanced gore systems offer gruesomely satisfying action. Coop story-driven campaigns for up to four players – survive around the world, as unique groups tell their stories of perseverance. Fight other players for survival – several intense 4v4 Player vs Player vs Zombies game modes complement the coop campaigns. Grow stronger – unlock powerful weapon upgrades and level 6 character classes to take on greater challenges