Retrocausality
I love a campy classic and Weird Age Games’ Retrocausality is a time travel game that takes inspiration from the big ‘80s adventures: Bill & Ted’s Excellent Adventure and Back to the Future. This game has an extended section on creating the rules of time travel, but it’s written in a way that helps you create those rules—more like a world-building guide for your own game than a piece of lore you’re stuck to. Retrocausality uses a custom card-based system that relates to the kind of problem you’re looking to solve, and specifically encourages fucking with the both the historic and gameplay timelines.
