A custom version of the GMS LTS runner for running DELTARUNE on Linux natively.

This was made for personal usage, support will not be provided. You are much better off playing the Windows version of the game under Proton.

This project is UNOFFICIAL. This software is NOT affiliated with nor endorsed by Toby Fox, Fangamer, 8-4 Ltd, YoYo Games or Opera Norway AS.

(although I would be very willing to help any of these people out if native Linux is in the cards...)

• Implemented game_change for chapter switching.
• Reading game files out of the executable directory, rather than assets/.
• Saving savegames to the home folder ($HOME/.config/DELTARUNE).
• Automatic handling of uppercase audio file paths.

• Fixed video support on modern Linux distros (backported from GMS Beta).
• Fixed the game becoming blurry after playing a video on older versions of the game.

You need to own DELTARUNE on Steam, or the Chapter 1&2 free demo.

1. Download DELTARUNE on Steam.
   • For the Chapter 1&2 demo on Steam, switch to the chapter1.2.lts.test branch.
   • You can also download the files for the Chapter 1&2 DEMO from itch.io.
2. Extract the deltaRunner binary into your DELTARUNE game files.
3. Run chmod +x deltaRunner to make the binary executable.
4. Launch the deltaRunner binary via Steam's "Legacy Runtime 1.0 (scout)".
   • ~/.local/share/Steam/ubuntu12_32/steam-runtime/run.sh ./deltaRunner

(Launching individual chapters can be done; e.g. ./deltaRunner -gamedir chapter4_windows launcher)

Video playback (for DELTARUNE Chapter 3) requires ffmpeg/libavcodec installed.

• Debian 12+, Ubuntu 22.04+: sudo apt install ffmpeg
• Fedora 41+: sudo dnf install ffmpeg
• Arch Linux: sudo pacman -S ffmpeg
• SteamOS: TODO

1. Download DELTARUNE on Steam on another computer and copy the files over.
   • You can also download the files for the Chapter 1&2 DEMO from itch.io.
2. Extract the deltaRunner_arm64 binary and provided .so files into your DELTARUNE game files.
3. Run chmod +x deltaRunner_arm64 to make the binary executable
4. Launch the deltaRunner binary.
   • e.g. ./deltaRunner_arm64

This should work on most modern arm64 GNU/Linux distros, including Debian 12 (untested), Fedora 42, and the Steam Linux Runtime 3.0 (sniper).

With DELTARUNNER - these issues only affect DELTARUNNER or the game when running under it:

• game_change does not properly preserve window position (offset by window border size).

With GMS LTS - these issues affect all games using GMS's native Linux runner:

• (x86_64) Requires launching under Steam Linux Runtime 1.0 (scout) or an older distro.

Nitpicks:

• Controller input is slightly broken.
• Savegames save to $HOME/.config rather than $XDG_CONFIG_HOME.
• Runs under XWayland when the user is using Wayland.
• Does not scale to HiDPI displays.