To my mind, Geometry Wars: Retro Evolved is probably the best and most addictive shoot-em-up of the last five years, if not the decade. Retro Evolved 2 is the better, more addictive version. Making it so can't have been easy. Bizarre pretty much perfected the core gameplay and the aesthetic with the Xbox 360 debut, and Retro Evolved 2 hasn't messed with it. You're still a lone ship adrift on a grid, manoeuvring with the left analogue stick and blasting with the right analogue stick against a constant, implacable tide of hostile neon shapes. Dead shapes leave little multiplier tokens behind, and the more of these you collect, the more points you get for each shape killed.