A system-neutral handbook of time travel concepts. (ttrpg)
When the time traveler had a bad moment, their handbook shattered, and got trapped in a multidimensional vortex. Brave scientists from across time carefully gathered the shards. They assembled it as best they were able, and the hints and secrets it unveiled continue to challenge people across the space dimensions.
Hold tight.
https://shannonmcmaster.itch.io/time-travelers
Source: itch.io