Internal Mod MENU CH1-CH5

Body

Explore DELTARUNE with an in-game sandbox menu!

Press F1 to access gameplay tweaks, inventory tools, room navigation and visual customization. Includes chapter-specific support for Chapters 1–5, using the content available in your installation.

Features

• Combat: TP editing and locking, god mode, one-hit kills, graze multiplier and adjustable game speed.

• Encounters: Disable encounters or start fights from a chapter-specific list.

• Inventory: Spawn items, weapons, armor and key items; edit money; enable infinite consumables.

• Party: Change your active roster using characters available in the chapter.

• Exploration: Noclip, room teleportation and an internal flag editor.

• Audio and visuals: Jukebox, sprite swaps, color tints, faster dialogue and simulated creepy error screens.

Keeps your game’s language

This download contains only mod source code and installation scripts—no game archives, assets or translations. The installer patches your own files while preserving their existing text. The menu interface is in English.

Installation — Windows

• Download and extract UndertaleModTool CLI 0.9.2.0 from its official release page. Choose UTMT_CLI_v0.9.2.0-Windows.zip.

• Extract the mod ZIP and close DELTARUNE.

• Run Install.cmd and enter your game folder and the path to UndertaleModCli.exe.

• Wait for installation to finish, launch the game normally and press F1.

Restore any older version of this internal menu before installing. Install your preferred translation before the menu. Full English and Italian instructions are included.

Controls

F1 opens/closes the menu. Arrow keys navigate and adjust values. Enter selects, Esc returns, Page Up/Down scrolls lists, and S searches catalogs.

Uninstallation

Close the game and run Uninstall.cmd. Keep each chapter’s .internal-menu-release folder: it contains the original backups needed for restoration.

Compatibility and limitations

Only assets present in each chapter are available; this mod does not import characters or bosses from other chapters. Noelle is unavailable in Chapter 1. Warps, unusual parties, flag editing and boss replays are experimental and may depend on story progression.

Back up your saves before experimenting. Saving in-game can retain inventory and story changes; uninstalling does not undo them. Fake corruption screens are visual effects only.

Compilation, text preservation and exact archive restoration were verified on five local chapter builds. Compatibility with every translation, game update or other mod is not guaranteed.

Credits

• Toby Fox and the DELTARUNE team — original game.

• UndertaleModTool contributors — external installation tool, downloaded separately.

Unofficial fan modification, not affiliated with DELTARUNE’s creators.

FULL PROJECT HAS BEEN UPLOADED ON GITHUB AT FOLLOWING PAGE: AndreaPerrelli/deltarune-internal-menu: In-game F1 sandbox menu for DELTARUNE (chapters 1–5), installed by patching your own game archives. Menu-only source distribution: no data.win, assets, translations or third-party binaries are included