39 About This Edition
September 2026. Built from the creators named in Ch. 1, community guides going back to 2012, the osu! wiki, and published research. The citation balance and how claims are weighted are described in How to Use This Book.
Corrections are welcome and expected. Three kinds are especially useful: a game value that has changed since this was checked, a claim attributed to a creator who didn't say it or meant something different, and a study cited for more than it actually shows. Mechanics change with almost every pp update, so anything in Ch. 35 has a shelf life.
On the creators. Everything here is summarized in this book's own words with attribution and links back to the original. Nothing is reproduced wholesale, and the intent is to send readers to the sources rather than replace them. If you are one of those creators and want a claim corrected, removed, or attributed differently, that request wins over anything written here.