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 $14.8K — a different platform, not this one.

Zombie Derby 2

Brutal upgradable cars, big guns and daredevil speed will steer you through places that are chock-a-block with zombies... It’s going to be a really exhilarating fight that no one will want to miss! The dangerous post-apocalyptic world is crawling with zombies and only the bravest and most experienced drivers and the toughest survivors will still be left standing, fighting the countless armies of the undead and dealing with them on their own or taking part in breathtaking competitions!