Thank you!
Hmm... We haven't got a plan for releasing on Steam or other marketplaces, but we can talk about it.
Honestly, I'm trying to remember what was unique about the X version we released on Xbox 360. "Enhanced graphics", evidently. More levels, in theory, but was that the DLC campaigns, or something else? It's been so many years... In any case, yeah, we could some day release everything that we released for the X version.