In this tribute to vector arcade classics, you must make it through 10 levels containing deluge after deluge of asteroids without letting them knock you all the way to the bottom of the screen. Crash into as many asteroids as possible for bonus points!

A game in which you face wave upon wave of enemies, and you don't have so much as a dull spoon to defend yourself with. That's not fair, you may think, but this is the fast-paced and frenetic hand you've been dealt, serving up a bountiful feast of action-y goodness that's hard to put down. You don't have any weapons of your own, but the hundreds of enemies eager to see your undoing have more than enough to make up for that, as you turn their heat seeking bullets right back onto them.

Grey Matter is an anti-shooter, which means that you can't actually shoot. You are the bullet, and you attack by directly colliding with the exposed brain-meats of your enemies. It looks great and sounds even better. The gameplay has all the depth of a modern professional shoot-'em-up, thanks to the combo system. Grey-Matter is perfectly playable without using the Trinity Attacks, but if you do employ them, it becomes almost like a hyperactive, twitchy puzzle game.