Crossover: Every Game You Want, I've Got

In the future, gaming has undergone a huge transformation, allowing players to experience things as realistically as possible.

In this era, game development has become a popular field. As a game developer determined to create a satisfying epic masterpiece, I'm currently stuck in a serious rut... But I have a way to deal with it, and that is to...

Play every game there is!

[Please Note]

1. The setting is fictional, and I'm making everything up. The logic may not always hold together, and out-of-character moments are inevitable.

2. This is a crossover with JoJo's Bizarre Adventure, Katekyo Hitman Reborn!, Tower of God, Gintama, Bungou Stray Dogs, Danganronpa, and more. I'll add others if I think of a good fit.

3. When I say every game, I really mean just a few games I've played. I've borrowed a lot of ideas, but there will also be new ones. (Please don't attack me over this.)

4. I don't know about the pairings. Maybe there won't be any. After all, this is just a fun story I'm writing for myself.

5. I'm writing this for love, just messing around.

Theme: Finding treasures in games?