SEE YOU SPACE COWBOY abbreviated CUSC is a ruleslite cowboy beepboop game. It's easy to run and pretty improv heavy so I could run it on short notice. It is incredibly beginner and oneshot friendly, and I have all of the books thus far.
THe 1977 Holmes edition of D&D is the so-easy-a-caveman-can-do-it version. Blueholme is a modern clone that expands Holmes for high-level play. The original also comes with a dungeon, and Blueholme has a module that serves as an expanded version of that too. Really I'm down for any old/basic D&D, this is just my favorite/what I have.
The world's favorite Teen Titans simulator. There are a few more moving parts to this one than the other two but once you get the hang of them it absolutely nails the vibe. Based on the Apocalypse World engine ("PbtA").
Sci-Fi Fridays circa 2000 simulator. PbtA like Masks, and still in beta but it already looks pretty darn good.
Mystery game modelled after the mechanics of Brindlewood Bay and the fiction of Gravity Falls. Being a Brindlewood-like, it emulates the story beats of mystery-solving instead of having a pre-determined solution.
Another rules-lite game similar to CUSC for Metal Gear-type action. Irregular is a hack to make it about sad robots.
PbtA game trying to create the Pokemon monster-catching experience. Quickstart on itch but I'm backing the final book.
Same as above but substitute Yu-Gi-Oh! for Pokemon. Or Pokemon cards for Pokemon I guess.
NES-Zelda type tabletop game, leans very hard into not just the fiction but the mechanics of video games.
Man I Love Fishing