Destro Plays: XCOM, Enemy Unknown and Warlock, Master of the Arcane

[Hiro Protagonest]

(and out of my reach, due to Steam)

It's on Gamers Gate.

And Steam does have an offline mode, if you really hate the problems that most DRMs have. Personally, I check Gamers Gate and GOG first, but I still buy games off Steam that aren't on those sites (Cave Story and Team Fortress 2 being good examples).