Warning! All spoilers below are unmarked.
- Creator's Favorite: Mari and Serina.
- Creator's Pest: Braeden.
- Diagnosis of God: Serina has been confirmed by the creator to be on the autism spectrum.
- Sequel in Another Medium: The Engine was formatted as slides you could see on Instagram, with sprites and everything. Revengine is written like a script on Archive of Our Own.
- What Could Have Been:
- In a sketchbook tour, it's revealed that Dolly used to be more goth-themed, and said theme was going to be their main gag.
- Braeden was going to be named Chad and was going to be a pothead.
- Chieko used to have a lilac jacket instead of red. It was changed after a poll.
- Yumi used to be called "Yubi" and had blonde hair. Yumi was also going to be a killer.
- Taylor was going to be called "TJ" exclusively during the final chapters and was going to let their hair down. This was scrapped in favor of the arc that occurs instead.
- Mami's name used to be Mami Rodriguez. They were also going to have platform boots. This was scrapped to distance her from Melanie Martinez.
- Word of Gay: Nearly all characters are confirmed to be LGBT in some way, even though some have no hints towards this.
