Civ V: Brave New World, and some assorted DLC that I was missing in various sub $2 packs
Dishonored Brigmore Witches DLC
Company of Heroes 2 Digital Collector's Edition and one of the on sale mission packs
XCOM: The Enemy Within expansion
Papers, Please (and an extra copy that I gifted)
Guacamelee! Gold Edition (even though I just played through it on Vita)
Morrowind GOTY Edition
Hmm, that seems like a lot more than the impression I had, which was, "I didn't buy much of anything".
But I guess I'm reasonably happy that I purchased stuff that I know I will play and enjoy (all the DLC stuff), and the rest was super cheap. I guess Company of Heroes 2 was a little expensive, but I enjoyed the original enough to where I feel like it's a good purchase.
And so the backlog grows.