Xor appeared on the BBC last year and was converted onto the Commodore 64 by Logotron, causing hardly a ripple on the C64 scene. Atari's conversion is very similar and retains all the good and bad points of the original.

It's a puzzle game with Boulderdash overtones where the player guides two heroes through a maze in the minimum amount of steps. The onus is on puzzle-solving, rather than on whizzing through the maze and avoiding the enemy, so the gameplay does tend towards the pedestrian. Still, puzzle fans should enjoy the action - and the fifteen big mazes means that there is plenty to keep you going.