Oi if you all haven't seen Void Bastards yet I highly recommend it. I haven't been so fully submerged in a game since I was a wee freshman in high school that actually consistently had time for marathon sessions. It's very hard to describe since it does so many things and largely succeeds. The main gameplay is very Bioshock-ish and the overarching choices of choosing what path to take, which ships to raid, and what upgrades to build when are tactical enough to make you feel accomplished without thinking TOO hard. It is 30 dollars though so that kind of sucks but I'm approaching 30 hours on it pretty quickly since I think it warrants at least a second playthrough. Who knows, maybe the summer sale will hit it.
