Dustline

Dustline is a top-down twin-stick shooter. Drop into the dust with a drone at your shoulder, fight your way down three floors of locked rooms, and take down the Electrocutioner at the bottom.

Every run lays out new floors. Walk into a room and the doors lock until every enemy is down. Pick up the scrap they drop, crack chests, and swap in better guns as you find them. Spend your scrap at the Skull Merchant's shop, then beat the guards at the lift to go down a floor. When everyone is down, the run is over and you start again from the top.