If you enjoy RPGs and exotic atmosphere to a story, I'd suggest Pathologic. Here's the appropriate reddit if you want to hear the praises sung of the game.

However, piggybacking off OP, does anyone have any suggestions on a good game from this sale? I've been in a gaming slump recently and I want something that I can get obsessed with for hours at a time. In my case, that usually means a 4X game like Civ V, but I've never really gone beyond that series. Any suggestions? I'm also a fan of RPGs and tactical games, so if there are any hidden gems on sale that kind of sound what I'm looking for, I'd appreciate the heads up!