4. GTR 2, PC.

Iain loves his racing sims, so when he said "GTR 2 is easily the finest racing simulation available for the PC," back in December 06, you know GTR 2 is the business. With "fabulous visuals, solid sound, and physics that would make Stephen Hawking jealous," who'd argue to the contrary? Perhaps not quite as polished as some of the recent console efforts, but a must own racer all the same.

3. Test Drive Unlimited, Xbox 360 and PC.

The whole MMO aspect of Test Drive Unlimited didn't really work as I had hoped, but no other racing game has hooked me like this did. "The strange thing about Test Drive Unlimited is that it grows on you without you really noticing. Before long you'll own numerous properties, be part of a club, be thinking about buying your tenth car, and you'll have clocked up a thousand in-game miles," I said in my rather mean 8/10 review last year. You can drive for miles and miles, and you will.