Deltarune Chapter 4 Save Editor

Chapter 4 save file facts

Chapter 4 shares its save layout with Chapters 2 and 3: a plain-text file of exactly 3,055 lines, one value per line, with no checksum to trip you up. (Chapter 1 is the odd one out at 10,318 lines.) Because the format is shared, the editor reads the chapter from your file's name — and on this page it is pre-set to Chapter 4, with a manual chapter switcher if you renamed the file. Playing Tenna's TV World instead? The Chapter 3 save editor handles files named filech3_0.

• filech4_0, filech4_1, filech4_2 — the three Chapter 4 save slots, in menu order.
• filech4_3 to filech4_5 — Completion FILEs the game writes after you finish a playthrough.
• filech4_9 — a continuation file the game overwrites every time you load a save.

On Windows the folder is %LOCALAPPDATA%\DELTARUNE; on macOS it is ~/Library/Application Support/com.tobyfox.deltarune/. Both the Steam and itch.io versions use the same folder, and Steam Deck players will find the files inside the Proton prefix. The save file location guide walks through every OS step by step.

Two rules before you swap files back in: quit the game first (it holds saves in memory while running), and watch out for Steam Cloud, which can restore an older copy over your edited one. And the golden rule — keep a backup of the original file before you change anything.

Dark Sanctuary save editing notes

Chapter 4's room list in the editor mirrors how the chapter is actually built. The Dark World half is a chain of three sanctuaries: the Dark Sanctuary (Atrium, Study, Library, Small Piano, Lower Left, Lower Right), the 2nd Sanctuary (Atrium, Floor, Study), and the 3rd Sanctuary (Stairs, Last Chamber), with the MIKE ZONE sitting near the end of the route. The list also keeps the lightner side one click away — Kris's Room, Noelle's House, Hometown, Castle Town, and My Castle Town — so you can drop a save back into a specific story beat on either side of the door.

One detail worth knowing before you touch the room line: Chapter 4 room IDs live in the 40xxx range. Chapter 2's rooms are 20xxx, Chapter 3's are 30xxx, and Chapter 1's are 10xxx. The save format may be shared, but the rooms are not — if you paste in a room from another chapter's range, the game will try to load a room its Chapter 4 script does not expect, which usually means a hang or a spawn in the wrong place. Stay inside the Chapter 4 list and this cannot happen. Want another shot at the chapter's closing sequence without replaying three sanctuaries? Set the room to "3rd Sanctuary - Last Chamber", save, and relaunch.

Chapter 4's own equipment occupies the high IDs. Its five weapons are the 50-series — JingleBlade, ScarfMark, JusticeAxe, Winglade, and AbsorbAx — while the low IDs (1–26) are the classic weapons shared with Chapters 2 and 3, including the BlackShard that first showed up in Chapter 3's table. The same pattern holds for armor: Chapter 4's additions are the 50-series Waterguard, MysticBand, PowerBand, PrincessRBN, and GoldWidow, and two key items are unique to this chapter — SheetMusic and ClaimbClaws at IDs 30 and 31. The chapter's four signature heals, AncientSweet, Rhapsotea, Scarlixir, and BitterTear, sit at item IDs 60–63, right after the classic consumables.

The spell table carries one Chapter 4 entry that deserves a word of caution: SnowGrave, Noelle's spell. Spell slots are stored per character, and a spell placed on a character who cannot cast it simply occupies the slot — it will not appear in that character's battle menu. If you are rebuilding a party member's spell list after a story event took something away, give each spell to the fighter who actually owns it.

Finally, remember that filech4_9 — the continuation file — is rewritten by the game every time you load a save. Editing it feels like editing "your" save, but the game will happily overwrite your work on the next load. Make filech4_0 through filech4_2 your edit targets, and leave the 9 file alone.

The honest state of Chapter 4 flags

Here is the part most tool sites gloss over: community documentation for Chapter 4's story flags is still incomplete. In Chapter 2, mappers pinned down entries like flag[571], which records how the Spamton NEO fight ended. Chapter 4 has not had that treatment yet — most of its flag numbers are unmapped, and anyone claiming a full list is guessing.

This editor does not pretend otherwise. The Advanced tab shows every raw flag value exactly as it sits in your file, so you can do real detective work: export a save before a story choice, another one after, and diff the two to see precisely which flags moved. It is slower than a labelled dropdown, but it is truthful — and it is how every flag map ever published got started.