World of OOO is the second SIC Hero Saga spin-off of Kamen Rider Decade.
- Actor Allusion: When the heroes fight Golden Wolf Man, Yusuke mentions that he recently saw a "popular superhero show" where a man in golden wolf armor fought a villain who looked a lot like Tsukasa.
- Alternate Universe: Decade's journey continues in the World of OOO, then the World of Gaim.
- Artifact Title: The story begins with the World of OOO but moves on to the World of Gaim and beyond.
- Power Copying: OOO assumes a Legend Tatoba Combo with Habataki (hawk) Head, Tiger Arms and Rider #1 (grasshopper legs).
