If you missed last year's chance to board the train to the dark horrible future of Metro 2033, your second chance is nearly here. The original was a surprisingly beautiful outing for your graphics card, considering that it was entirely set in desolate sewer tunnels. This new version is hardly cheerier. In this hot clip from Machinima , prepare for underground menace, Nazi subway stations, and giant mutant monsters down below, all struggling to stop you reaching Mornington Crescent. Or save the world. One of the two.