I'm not surprised Arkham Asylum won this award the game is like totally awesome. You really need a power system to run it but it blows you away.
Preview: Batman: Arkham City
Theoretically, nothing was Rocksteady Studios from releasing a glorified expansion pack as their sequel to critical darling and gamer favourite, Batman: Arkham Asylum. Slap together some new levels, introduce a few new villains, and voila - the rivers of gold would flow once more. Ref. Source 7
Batman: Arkham Asylum Minimum System Requirements
OS: Windows XP/Vista
Processor: Pentium 4 @ 3 GHz / AMD Athlon64 3000+
Memory: 1 Gb
Hard Drive: 9 Gb free
Video Memory: 256 Mb
Video Card: nVidia GeForce 6600 / ATI Radeon X1300
Sound Card: DirectX Compatible
DirectX: 9.0c
Keyboard
Mouse
DVD Rom Drive
Batman: Arkham Asylum (Hover)