Price and Availability

• Platform: iOS
• Price: 69p
• App Store

Enemies move down the grid gradually at first, in Centipede-like formations that break apart and leave debris as they're shot to pieces. This debris can then be used to funnel enemies into concentrated fire, catching long lines of them, Galaga-style, but after a certain time the debris into missiles. This can also be juggled for big points, but it's a hard trick to pull off when things get frantic.

The first few grids are easy, but soon you start hitting the crazy zone - the screen's jammed with deadly pixels, the ship desperately darting left and right, and the sweet sweet screen-clearing power-ups become your sole focus. These new power-ups ratchet your ship's firepower for a few brief, blaring seconds and let you mow down almost everything on the grid if used correctly. It's entirely possible to bounce from one into another, a concerted bullet hell that wipes entire levels clean in one beautiful adrenalin-fuelled burst.

This isn't just a great shooter, it's a thrilling one. Half the time you don't even see what destroyed the ship, the screen so swarmed with nasties that your finger's long since taken on a life of its own, somehow threading a needle between shrapnel and laser beams before they even register. Gridrunner's a blast, and the best shooter on iOS.