Do I need the original game files to run Deltarune?

Yes. The project does not include the original game's assets, so you need your own copy.

Deltarune

DecompilationSporadic

Source code reconstructed from the original game's compiled binary, so the game can be understood, rebuilt and ported.

Based on Deltarune

Links, repository & details

About

A decompilation of DELTARUNE intended to give modding access. You need to own a copy of the game.

Getting started

Own a copy of the game, clone the repo, and load the game's data file in UndertaleModTool (GUI). Run the asset importer script from the repo's utilities folder, then open the project file in GameMaker Studio 2022.0.3.85.

History

The project was inspired by an earlier UNDERTALE decompilation by danielah05.

Known issues & limitations

Chapters 3 and 4 have several decompiler bugs that are being fixed manually.

What you need to run it

Original game files required. The project ships code only; you provide your own copy of the game.

You need to own a copy of the game.

Features

The project provides access to the game for modding.

Summarised from the project's README.

Additional notes

Faq: Chapters 3 and 4 have several decompiler bugs that are being fixed manually; chapters 1 and 2 should have no issues.
Assets: Chapters 1 and 2 are free via the demo, while chapters 3 and 4 cost money, and the README says piracy is not condoned.

FAQ

What is Deltarune?: Deltarune is an open-source decompilation of Deltarune. Source code reconstructed from the original game's compiled binary, so the game can be understood, rebuilt and ported.
Do I need the original game files to run Deltarune?: Yes. The project does not include the original game's assets, so you need your own copy.