Call me a mad scientist, but I've been waiting for Bulkypix and Little World Studios' Survivium since I first saw the game back at E3 in June.

The idea is simple. It's a virus creation game that has you building up different behaviours to try to design the best - by which we mean the baddiest, most virulent - virus, which will destroy all other viruses.

This process is fairly easy as you drag and drop pre-built behaviours such as move, rotate, divide and eat into longer sequences.

Each virus is then dropped into an environment and battles against an opponent over a period of ten seconds or so. The one which controls the largest percentage of territory at the end of the time is the winner.

Reproduce and die

The game, which is presented in a breezy cartoon style, has a main training mode, which has you fighting against computer generated opponents - 30 missions worth - or you can also go online and play against other players' creations, or directly challenge your friends and their germs.

It also has a global ranking so you can see just how much of a mad scientist you really are.

Survivium is out now for iPhone and iPod touch, priced 99c, €0.79 or 59p.