Deep Rock Galactic

Nothing really special about this one: complete 500 missions. That’s about it.
Tips:
Search for missions in your quick play that have a high minute count. This is a direct indication that the mission is likely close to being completed. This will save you both time and ensure a nice payout as you will still be paid regardless of time spent in the mission.
It goes without saying that the fewer yellow markers on the mission, the quicker that the mission will go but with a smaller payout. It’s up to you to decide if you want a better payout or want to shoot through the 500 count as fast as you can.
By the end of my 500 missions I had promoted three of my dwarves to second-level bronze and the fourth to third-level bronze through a mixture of quick play and payout play-through. It took me about 150 hours of gameplay to complete though again I mostly took my time.
Regardless just playing the game normally will eventually complete this mission and you can complete it single-player if you prefer that experience.