Deep Rock Galactic is a 1-4 player co-op FPS featuring badass space Dwarves, 100% destructible environments, procedurally-generated caves, and endless hordes of alien monsters.
A new game @loose_unit turned me on to and it is quite addicting for some reason. I've been enjoying this for a couple of weeks now. It's on 30% discount at the moment as well.
Basically Mindcraft meets Left 4 Dead. You mine minerals for the mining company while shooting down varying intensities of "waves," surge in cave bugs that come after you. On top of mining minerals, you also have to building an oil mining rig and maintain it because the bugs also will attack it because it makes so much noise. You can either go it alone or play with up to 4 people. You choose which character you want to be, scouter, engineer, driller, gunner. Each person has their strengths and weaknesses that will benefit the team you're with. Also there's different plants scattered about that you can get to build up supplies to make different kinds of beers in the miner lobby's robot maintained bar.