Play it with your bare hands. The whole game now works without controllers. Pinch anywhere to shoot, and look where you want the shot to land. Hold an open hand over a grenade and swing your arm to throw it. Hold an open hand over the laser for three seconds to pick it up. There is a rack at waist height on both sides of you, in two fixed places you can reach without looking, so your gear is always in the same spot. Spend your salvage mid run. On rounds 5, 8, 10, 15 and 20 the fight pauses for twenty seconds and the upgrade tree opens. Buy what you need and carry on, or ignore it and the next round starts on its own. You can tell where you are being hit from. Claw marks rake across the edge of your view in the direction the hit came from, with a sound to match, so a bite from behind reads as behind instead of as a number quietly going down.

Grenades and the laser now work with your bare hands, so the whole game can be played without controllers. Reach into an item on the desk to take it, swing your arm to throw. Getting hit now tells you where it came from, with claw marks that rake in from the direction of the attack. There is a twenty second upgrade break before the hardest rounds so you can spend what you have earned. Two enemies that used to be locked away in the late campaign now appear while the fight is still winnable. The armoury has been rebuilt around one page that shows what each gun is actually worth. Zombies turn smoothly instead of snapping, take more varied paths, and no longer walk through closed doors.

CONTROLLERS ARE OPTIONAL. The game supports PSVR2 Sense controllers, but it does not require them. With no controller connected the app falls back to a head-aimed weapon: look where you want to shoot and pinch anywhere to fire. A red laser dot shows exactly where the shot will land, and an empty magazine reloads itself after about one and a half seconds.