If you've ever harboured a desire to spend hours in a confined area with numerous sweaty Germans - and who hasn't? - here's your chance. Silent Hunter IV: U-Boat Missions is an add-on for the original Silent Hunter IV that pops you in a leaky metal tube, pats you on the back and sends you off to do the Fuhrer's bidding. You'll be bobbing around the Indian Ocean between 1943 and 1945, and will have access to various new strategic elements, such as scout planes and armed merchant cruisers.

If the idea of a submarine sim ranks right up there with real-time knitting games and turn-based duck herding, then you'd be wrong. SH4 is a gorgeous sim, packed full of tense and nervy gameplay. And, if you're so inclined, some truly action-packed trigonometry. Can't say that about Super Mario Galaxy, can you?