As someone who can't decide which of the amazing systems I should play next, especially within the Into the Odd family, STRING THEORY is the perfect supplement for me. I'm also a big fan of both Doctor Who, Spelljammer, & MTG. This supplement checks every box for me. It's clear, concise, & clever! Regardless of whether you ever play this supplement as intended, this is worth a download for the d66 table of systems on the last page. It is a lovingly curated list of extremely talented authors, many of which will answer your comments/questions personally if you reach out.

This supplement deserves more stars than I can give & it's only 8 pages long. If you like Doctor Who or any other multiverse based media, you should definitely check this out. If you like Into the Odd, then you should definitely check this out. Also check out the author's other work, they just keep pumping out excellent content!