Dust off your BFG 9000 – the 1993 classic shooter, id Software’s Doom, has returned to the Xbox Live Marketplace after two years in limbo (it was removed back in 2009 when id was taken over by ZeniMax). Time to kick Hell’s army and its hordes of demonic monsters from here to kingdom come. You can go classic campaign or opt for online deathmatch or team up with another trigger-happy psycho in co-op. A retro must for first-person shooter fans. Doom is available for download on Xbox Live Marketplace for 400 Microsoft points — about £3.50 in old money (marketplace.xbox.com)