If you've ever wanted to play your own MMORPG, the upcoming indie game Let's Build a Dungeon should be on your wishlist. From the developers behind Let's Build a Zoo, Let's Build a Dungeon is a management sim not dissimilar to Stardew Valley, but instead of running a farm, you're running a game studio.
Instead of raising crops and livestock, you recruit and manage game developers, manage development schedules and advertising strategies, and make tough decisions about when to release your project, whether it needs to be delayed, and whether you should "bow to community requests, or stay true to your creative vision."