Every hit pays, every kill pays more. Points buy everything, so shooting is earning.

Doors open new rooms. More space to run means more room to survive.

Wall guns are the outlines chalked on walls. Buy once, then buy ammo at the same spot.

Perk machines are permanent for the run: more health, faster movement, faster reloads, healing, and a one-time self revive.

The mystery box rolls a random gun. You choose whether to take it.

The retool station upgrades the gun in your hands.

Pick up a second and both stay with you. The one you are not holding shows at the bottom of the screen. Tap it to switch.

Each round adds more of them and tougher ones. Every fifth round the hounds come instead. Keep moving, never let them circle you, and the power switch changes the night.