Absolutely no computer operating system is complete without some sort of tetris game for it. EPOC, the Revo's operating system, is no exception - there are in fact several, but Steve Litchfield's Atomic is the only one at the time of writing to work on the Revo.

Tetris, as you almost certainly know, is an arcade/puzzle game in which different blocks fall down the screen, and must be rotated and slotted together to make whole lines, which then disappear. The more lines you remove, the higher your score.

Atomic is played in a small vertical section of the screen, about one fifth or one sixth of the screen wide. To the left is the score, and to the right is a picture of an aircraft and a warning of the next block to fall.

After starting play, black blocks begin to drop as normal, but as the game goes on they become increasingly quicker much faster than most other tetris games, making Atomic extremely fast and furious by the time you get a few levels further up. I've never got past level 6, and even that level gives you hardly any time to think! Atomic is particularly difficult on the Revo as you only have its smallish keys (which are customisable, although the 'rotate' button is not) to use to play the game with. When the game gets quick I often tap the 'drop' button by accident, with disasterous results!

If I was to try to find fault with Atomic, I do have one exceptionally minor gripe - the menu isn't like other Revo program's menus in that it doesn't use an ellipsis (three dots, that is ...) after menu items which launch a new floating window. This, however, is a very minor fault and doesn't really retract from Atomic's usability.

Tetris games tend to be addictive, and Atomic is one of them. As, of course, it's free, it's surely worth downloading and trying out. Its fast-paced play may not suit everyone, but if you prefer action to puzzle and strategy games it should fit you to a tee.