Deep Rock Galactic
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.
Opinion
This game provides more bang for the bug than most other AAA games. Actually it provides spiders, loot bugs (the animal not a software bug), minerals and a cheap bear at the bar.
It is the best coop shooter and from my point of view even better than Left 4 Dead 2.
The DLC’s only provide cosmetics and are your option to support the developer.
If this kind of games is nothing for you, have a look at their board game, which provides a great offline experience.