Shortcut door

... Where'd this door come from?
Dunno... come to think of it, I've never seen it before.

Jigsaw Joe, Chapter 1

Shortcut doors are a type of recurring Dark World door in Deltarune. The party can use them to fast travel to previously-visited areas after reaching a later location in a Chapter. In some circumstances, the shortcut door is the only way to backtrack to certain areas.

Before being activated, the shortcut door appears as a simple, dark doorframe which the party cannot see through. After activation, it becomes a door with a flickering fire emanating from underneath it.

Locations

Chapter 1

Name	Region	Location	Activation requirement
Field	Field (map link)	In the room east of Seam's Shop.	Reach the Forest shortcut door.
Forest	Forest (map link)	At the Forest entrance, in the room east of the Great Board.
Bake Sale	Forest (map link)	In the Bake Sale room, on the west side of the room.	Reach this shortcut door.
Castle	Forest (map link)	At the end of the Forest, in the room just before the entrance to Card Castle.	Enter Card Castle.

At the Forest shortcut door, Mr. Elegance claims that he and Mr. Society fixed the shortcut door for the party.

If the party interacted with Jigsaw Joe before reaching this shortcut door, he is also present and mentions he helped fix the door. If Kris talks to him again, he states he does not know where the door came from, and has "never seen it before". Mr. Elegance mentions that the three of them worked on it together, so they are confident the door will work. If the party did not interact with Jigsaw Joe, Mr. Elegance expresses concern that it might malfunction, because only the two of them worked on it.

If Kris talks to Mr. Elegance after escaping prison, he states that the "door'll go even further than before". Though, Mr. Elegance adds that he is "Not sure'n what we did to make it work like that, but..."

Chapter 2

Name	Region	Location	Activation requirement
Cyber Field	Cyber Field (map link)	In the room south of Sweet Cap'n Cakes's shop.	After any plot cutscene in Queen's Mansion while not on the Weird Route.
Trash Zone	Cyber City	In the Trash Zone, near the entrance to Cyber City.
Mansion	Queen's Mansion	At the mansion entrance, in the same area as Swatch's shop.

In this Chapter, the shortcut door is the only way to backtrack to these areas.

On the Weird Route, all of the Chapter 2 shortcut doors never activate, permanently remaining as empty doorframes.

Chapter 3

Name	Region	Location	Activation requirement
TV World Entrance	TV World (map link)	In the first room the party travels to after escaping from Tenna's ball cages.	Reach the cutscene where Elnina, Lanino, and Mike quit their contracts.
Goulden Sam	TV World (map link)	In the room with the Goulden Sam that marks the midway point of TV World.
Green Room	Green Room (map link)	In the red carpet hall leading up into the Green Room, to the west of its entrance doors.

The requirement means that it is possible to activate the shortcut doors without entering the red carpet hall, if the player reaches the above cutscene and then backtracks to the Goulden Sam room.

Chapter 4

In the Dark Sanctuaries, shortcut doors are replaced with differently colored Guei flames, known as "warp flames" internally, that function similarly. The colors correspond to where they warp to. Blue Flames only appear if a Game Over from a miniboss has occured, which instantly warps the party to the respective encounter.

Color	Region	Location	Activation requirement
Green	Dark Sanctuary	Near the Great Door leading to the 3rd Sanctuary	Restore the Dark Sanctuary after navigating the 2nd Sanctuary.
	Study	Blocking the entryway to the fireplace
Pink	3rd Sanctuary (map link)	Entrance area, above the bend to the right	Reach the Stairs area.
	3rd Sanctuary (map link)	Stairs area, to the left of the judgment bell.
Red	3rd Sanctuary (map link)	Stairs area, to the right of the strange spring	Reach the Last Chamber.
	3rd Sanctuary (map link)	Last Chamber

Warp flames only appear after completing the 2nd Sanctuary. The warp flames are the only way to backtrack between all of these areas.

Chapter 5

Due to Flower Kingdom's larger size compared to previous Dark Worlds, it has a total of twelve shortcut doors rather than the usual three, separated into four regions with three doors each.

Region	Name	Location	Activation requirement
Garden	Hopschef	Hopschef's room	After the cutscene in the room just before Top of Castle. Must have entered these rooms prior to being able to use them.
	End of Garden	Next to the Way Home SAVE point.
	Near Shrine
Castle	Foyer
	Mysterious Puzzle
	Blue's Room
Cliffs	First Climb
	Netskie Climb
	Shop
Top of Castle	Green's Shop	Next to the SAVE point of the same name.	Encounter Green's Shop for the first time.
	Last Room		Get to the end of the Chapter- activates prior to the final fight.
	Pink Door		Take the alternative path in the room directly after Green's shop and reach the Pink Door.

Trivia

• The shortcut door's sprite is reused from Undertale. In Undertale, it was used as the door to Sans's room.
• In Chapter 2, it is possible to perform a glitch where the empty Cyber Field doorframe brings up its activated textbox instead of its deactivated textbox, allowing the player to pick a warp destination. If the player picks Queen's Mansion, they will skip Cyber City entirely.
  • Due to the coding of Chapter 2's shortcut doors, this will cause the Mansion's shortcut door to be disabled because no plot cutscene inside of the mansion has been viewed yet. Once the party reaches any plot cutscene, the shortcut door will become activated.
  • During the Deltarune: Chapter 2 Main Route event at Awesome Games Done Quick 2022, Toby Fox had donated $1997 to the stream, stating, "Here's 1997 KROMER so that we can see Spamton in DELTARUNE Chapter 2! .. What!? He's not in the run!?" This references that Spamton is never encountered in the run due to the skip.