I played Metro 2033 in full graphics on my PC before my ATI 3870x2 from 2008 died. It was an absolutely beautiful game in DirectX 10.
I am a HUGE fan of the S.T.A.L.K.E.R. series, and the creators of that game made Metro.
I would like to see if I can get the sequel for 360, Last Light looks AMAZING!
If you are a fan of Metro, or Fallout 3, or Borderlands, or RAGE or any other large open world post apocalyptic FPS/RPG hybrids, I suggest you get Stalker the complete collection on PC. I actually love that series as much as I do Shenmue, it is that immersive, and the atmosphere blows anything else out of the water.
[youtube]
http://www.youtube.com/watch?v=NHxCJ8uB2cY[/youtube]
It takes place in Chernobyl in 2012 after another reactor blows.
Any PC from the past 5 years should run it, it came out in 2007 but can be scaled back to DX7 if you don't have DX9.