A roguelike train defence game for iPhone. You are not the train. You are the rig above it — one small craft that has to be everywhere the consist is failing at once.
Twelve waves to the terminus. Fly the roof of a moving train, overcharge the car you are standing over, stomp the boarders off the deck, and pull the scrap in before it falls behind the line. You cannot be in two places, and that is the game.
Between waves the line pulls into a station where the shop is not a menu: goods stand on plinths, a board shows the price of a repair, and a lever marked DEPART sends you back out. Buy a car. Bolt a module to it. Decide whether to spread three of a kind in a row for the battery bonus, or fuse them into one car a level higher that takes a single coupling instead of three. Breadth or depth. The train is only so long.
Free is the whole game: all twelve waves, every car type, every module, and the depot that banks what a dead run earned. The Line Pass is one optional purchase that opens the difficulty ladder past the first line and the deeper depot ranks. It is a one-time unlock, not a subscription, and it is restorable on any device signed in to the same Apple Account.