Sleep
Sleep is a common mechanic in Deltarune that becomes available once a Chapter has been completed. It allows the player to skip past the Chapter's opening scenes. It is intended for speedrunners or those replaying the game to save time.
It is performed by interacting with a bed or sofa, where the player is warned that if they go back to sleep, they "may miss a lot of important things".[1] If they choose to go to sleep anyway, they are instantly fast-forwarded to the beginning of the main Dark World events of the Chapter. The game's story is unaffected and plays out as if the skipped sections were completed like normal. All missed Completion FILE flags are set to their defaults.
Sleep becomes available once the given Chapter has already been completed and a Completion FILE is present.
Kris may sleep in their bed, which skips the entire school segment and takes them to the beginning of ??????.
Kris may once again sleep in their bed, skipping the school section as well as Castle Town, and taking them to the beginning of the Cyber World.
Kris will appear to wake up alone on the first screen of the Cyber World, but Susie is invisibly in the party as indicated by the menu. Once the first screen transition is taken, Susie will automatically reappear.
Kris may go back to sleep on the Dark World sofa, prompting an annoyed comment from Susie. The entire section where Ralsei joins the party and Tenna's introduction is skipped, and the sofa floats away, bringing Kris to the game room right at the beginning of Board 1. Kris's name is set to KRS.
Kris may sleep "an incredibly long time" in the armchair in the Dreemurr residence, skipping the entire Light World including the Church and Noelle's House, and taking them to the beginning of the Dark Sanctuary. This is only possible before Susie joins the party, at the very beginning before Kris walks near the breakfast table. In the Weird Route, sleep is not available (the armchair cannot be interacted with at all).
Unlike Chapter 2, Susie walks on-screen and joins Kris immediately after Kris wakes up.
Kris may go back to sleep in their bed, skipping the entire Light World and appearing in the first room of the Flower Kingdom.
Like Chapter 4, Susie enters the room from the right and tells Kris to get going.
It is also possible to skip the entire opening cutscene of Kris entering their room and putting the SOUL in their body by holding MENU button if a completion FILE is present.
Susie's unique dialogue in Chapter 3
Warning before going to sleep in Chapter 4
Warning before going back to sleep in Chapter 5
Susie's unique dialogue in Chapter 5
- ↑
(Its your bed.)
— Narration upon interacting with the Kris's bed in Kris's and Asriel's Room in Chapter 1
(If you go back to sleep, you may miss a lot of important things.)
(Will you go to bed?)