A different sort of time travel RPG idea
RPG idea: each player creates (let's say) three character sheets that are essentially four copies of the same character concept but with minor adaptations to three different eras in history (maybe medieval, industrial, and modern). Game sessions alternate between these three eras, with characters in the later eras gradually uncovering bits and pieces of the lives lived by characters in the earlier eras, perhaps with an implication that they are reincarnations of each other, or with later characters solving mysteries or finishing tasks left incomplete by earlier characters. Time travel may be involved at some point, or maybe not.