Undertale Multiplayer Chaos Mod

This Undertale mod allows you to set up a multiplayer session of sorts. By this, I of course mean while one person is playing the game, a second person from another device can mess with the game session of the first player. So far, given options are:

Previous Room (not yet working for unknown reasons)

Next Room

Random Room

Teleport to Room

Force Omega Flowey

Foxy Jumpscare

Baldi Mode

Martlet Fight

Phone Assassin

Sans Monologue

If you want to, do consider supporting me through Patreon. In exchange, I'll probably be able to actively work on a lot more of these game mods:

https://patreon.com/gamelamp

Also, do consider checking out Gamelamp, my YouTube Channel:

https://youtube.com/@gamelamp

Install instructions

For the player's device:

To begin with:

1. Open DeltaPatcher, select data.win as the original file. This should be found in:

C:\Program Files (x86)\Steam\steamapps\common\Undertale

2. Select chaos_v4.xdelta as the XDelta patch

3. Click "Apply patch", this should allow Undertale to receive requests from another device.

4. Move server.exe into your Undertale folder, open it and click to allow when the Windows prompt comes up.

NOTE: You might need to enable port forwarding for port 62006 (TCP) on your router. I'm not sure how to do this for every router type but you should be able to find out relatively easily.

For the controller:

1.  Open controller.exe

2. In the IP address section, enter the IP of the player