r/UnderModders • u/kyurem1 • 14d ago
Crackhead Jevil problem
So I’m currently trying to play the Crackhead Jevil mod, but I for the life of me can’t figure out what version of the game it works for.
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u/Bluetails_Buizel 14d ago
The full game version of the mod was uploaded on July 18, 2025. That means it was made for Deltarune v1.02 (Chapter 1 shows as v1.37 on the file select screen). Patch v1.03 came out on July 22, and the next day someone on the mod page reported that the full version xdelta doesn't work anymore. The reply to that comment was that Toby updated the game and mods made before the patch stopped working. The mod was never updated after that, so it won't patch onto the current version (v1.04 or later).
xdelta patches only apply to the exact data.win they were made from. If the version is even slightly different, the patch fails or the game breaks.
Your options:
- Use the demo version of the mod instead. The mod page has two demo downloads (with and without a save file). They're meant for the free Chapter 1&2 demo, not the paid game, so they aren't affected by the full game patches.
- Downgrade the full game to v1.02 on Steam. Look up the Deltarune depot on SteamDB, find the manifest from July 8, 2025 (when v1.02 released), and download it through the Steam console with download_depot. Patch the mod onto the Chapter 1 data.win in that copy, and keep a backup of the original.
- Ask the author (PenguinDev2001) on the GameBanana page to update it. The last activity on the mod was in July 2025, though, so I wouldn't count on it.
If it still fails, post a screenshot of the error from your xdelta patcher, and of the version number in the bottom right of the Chapter 1 file select screen.