I beat Portal 100% yesterday! And i mean 100%...all achievements. That was definantly a challenge...but i love the game so much i couldn't stop playing. Check my blog to see proof pics :P

I'm running this game really well with settings all at max and at 1920x1200 resolution. Fraps shows about 45-70 fps I'm running an e6600 at 3.1 ghz and a 320 mb 8800 gts all on a dell 24 inch HC monitor.