Do I get just a Steam code? Or is it a Steam code along with a DRM free copy I can download? (like that on GoG?)
You get a DRM-free copy, plus a Steam code too, yes. 
Awesome. I think I’ll do that then.
That way I can have my girlfriend play the game. She should love it, seeing as she’s addicted to Facebook anyway. lol
Yeah, it’s great both I and my wife can play it–unlike Steam’s setup that only allows one player at a time in a game like this.
I play lots of Steam games online on my main computer while my friends play offline on my other computer. 