mevoworld.com/The Steam version of Mevo & The Grooveriders includes costumes based on Left 4 Dead characters Bill, Louis, Francis, Zoey, & the Hunter.System RequirementsOperating System: Microsoft® Windows® XP / VistaProcessor: 1.33 GHz or higherMemory: 500 MB or moreHard Disk Space: 80 MB uncompressedVideo Card: StandardSound Card: StandardDirectX® Version: 8.1 or higher