Let me start by saying I know very little about the differences between Spelunky and Spelunky HD. However, I assume there are some because a good number of the existing questions for it are also tagged xbox-360 or xbox-live-arcade, presumably to distinguish it as the HD version. This probably wasn't a good system in the first place, but now that the HD version has come to PC, it makes even less sense.
What needs to be done with these? Should we just remove the extraneous tags, or do we need a new tag for spelunky-hd?