MDK2 HD 20% off on Steam if you own the non-HD version

MDK2 HD is now available on Steam, and if you own the original game in your library, you can get the HD upgrade for 20% off. Originally exclusive to the Beamdog service, Overhaul Games’ version of BioWare title will run you $14.99 on Valve’s service. The HD version of the game was originally released in October. Thanks, Joystiq.