From the author's README on Thunderstore

Adds every song from the Deltarune Chapter 1 soundtrack by Toby Fox into Skate!

Playlists & Tracklist

Deltarune Chapter 1

Toby Fox - ANOTHER HIM
Toby Fox - Beginning
Toby Fox - School
Toby Fox - Susie
Toby Fox - The Door
Toby Fox - Cliffs
Toby Fox - The Chase
Toby Fox - The Legend
Toby Fox - Lancer
Toby Fox - Rude Buster
Toby Fox - Empty Town
Toby Fox - Weird Birds
Toby Fox - Field of Hopes and Dreams
Toby Fox - Fanfare (from 'Rose of Winter')
Toby Fox - Lantern
Toby Fox - I'm Very Bad
Toby Fox - Checker Dance
Toby Fox - Quiet Autumn
Toby Fox - Scarlet Forest
Toby Fox - Thrash Machine
Toby Fox - Vs. Lancer
Toby Fox - Basement
Toby Fox - Imminent Death
Toby Fox - Vs. Susie
Toby Fox - Card Castle
Toby Fox - Rouxls Kaard
Toby Fox - April 2012
Toby Fox - Hip Shop
Toby Fox - Gallery
Toby Fox - Chaos King
Toby Fox - Darkness Falls
Toby Fox - The Circus
Toby Fox - THE WORLD REVOLVING
Toby Fox - Friendship
Toby Fox - THE HOLY
Toby Fox - Your Power
Toby Fox - A Town Called Hometown
Toby Fox - You Can Always Come Home
Toby Fox - Don't Forget
Toby Fox - Before the Story

Installation

Install via Thunderstore Mod Manager, or drop into your ReSkate launcher.

Packaged with ReSkate Music Packer

Install Deltarune Chapter 1 OST

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Deltarune Chapter 1 OST and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.