Space Invaders Revolution (DS)

Taking the form of a world tour, players must battle waves of invaders in locations around the globe, eventually taking in a climactic showdown with the UFO mother ship on the moon. With unique rules for each geographical stage, the player must battle though three rounds to successfully defend that particular location before moving on to the next. In London, for example, players must shoot the invaders in a colour-coded order to defend Big Ben. At the Acropolis, Athens, the challenge comes in the form of a heavily armoured but lone invader, which takes several well-timed direct hits to kill. Other novel forms of videogaming's archetypal aggressors, such as shadow invaders that blink in and out of invulnerability and giant invaders that must be killed piece-by-piece, bring the total of unique invader types in Space Invaders Revolution DS's New Era Mode to 13.

Comprising of 20 different challenge locations, there's 60 levels to fight through, so it's understandable that the player should have a helping hand from an array of extremely useful power-ups, including protective shields, additional support craft, rapid-fire shots and column-clearing laser beams - essential aides as the action becomes progressively more intense. Even better news is that these power-ups can be used in combination: using the support craft with the laser power-up results in three laser beams, decimating multiple waves of invaders with every press of the fire button.