Bot Tsunami

Ninety levels, fifteen kinds of bot, one finger. Hold the line while the swarm comes down, and fill the ring: the Tsunami clears the screen once, and only once.

They come down in waves. You have one finger and a line to hold.

Bot Tsunami is an arcade defence game about one thing: the moment when there are more bots on the screen than you can tap, and you have to decide what to hit first.

ONE FINGER, EVERYTHING Tap a bot to hit it. Drag to sweep a whole path. Draw a circle to open a vortex that pulls the swarm into a lethal core. No virtual buttons crowding the screen: the gestures are the controls.

FIFTEEN KINDS OF PROBLEM Every archetype asks a different question. The Bomber wants to die inside the crowd. The Shield laughs at taps and needs an explosion. The Healer gives back the damage you deal around it, so it goes first. The Phaser turns intangible and your hits pass straight through. The Chameleon disappears into the scenery and leaves only its eyes.

THE TSUNAMI Destroy bots to fill the energy ring. When it is full, swipe up and a wave clears the screen. It is the only thing in the game that solves everything at once, and it is never ready when you want it.

NINETY LEVELS, TEN PLACES A factory, the metro, a dam, a foundry, a server farm, a port, a desert lab, a reactor, orbit, and the core. The road ends somewhere, and there is a reason the last three levels are called Singularity, Silence and Tsunami.

ABILITIES AND DEVICES Spend the energy cells you collect on abilities that stay with you for good, or on devices you place on the field before the wave arrives: a crusher, a Tesla coil, a train, a wind turbine, a magnetic trap, a floodgate, a heat reactor.

THREE STARS PER LEVEL Survive, beat the score, take no damage, reach a combo, clear a group with a single Tsunami. Two hundred and seventy stars, and the hardest ones ask you to plan the wave, not to tap faster.

NO ADS. NO SUBSCRIPTION. The whole game is in the app from the first minute. Energy cells can also be bought, and nothing in the game is locked behind them: they are time, not access.

iPhone and iPad. Plays in portrait, with one hand.