

This mod uses Marioalexsan's ModAudio Mod to replace Atlyss' Soundtrack with tracks from... god dude a lot of places.
The full track list is below.
Credits to:
All respective owners for their tracks; they'll be in the list.
OmegaJaimX for the OST replacement template.
As stated before, this pack relies on and requires Marioalexsan's ModAudio Mod v4.1.1, i cannot guarantee it may work on other versions of the mod.
The mod targets ATLYSS - ver. 102025.a2, but it should hopefully still work with any future or older ones.
The mod will likely stop working should there be any updates, especially major ones.
Main Menu = Title Screen (Lobotomy Corporation; Project Moon)
Character Select = File Select (Sonic 3; SEGA)
Character Creator = Mii Channel (Mii Channel; Nintendo)
Sanctum Day = Back to the Holler (Night in the Woods; Alec Holowka)
Sanctum Night = Lobby (Library of Ruina; Project Moon/Studio EIM)
Outer Sanctum Day = Roundabout (LUMINES; Takayuki Nakamura)
Outer Sanctum Night = #8 regret (Splatoon 2: Octo Expansion; Nintendo)
Effold Terrace = Beat 2 (Peggle Deluxe; PopCap)
Slime Diva = Short Fuse (Dust: An Elysian Tail; HyperDuck SoundWorks)
Arcwood Pass Day = Silverpoint (OneShot; Nightmargin)
Arcwood Pass Night / Crescent Keep Night = Thru the Mirror (Epic Mickey 2: The Power of Two; Jim Dooley)
Executioner's Tomb = Infinite, First Bout (Sonic Forces; SEGA)
Sanctum Catacombs = La Danse Macabre (Shovel Knight; Jake Kaufman)
Sanctum Catacombs Battle = Boss Theme 1 (Super Smash Bros. Brawl; Nintendo)
Sanctum Catacombs Boss = Beatdown Strider Style (Homestuck; Curt Blakeslee)
Crescent Road Day = Murder Drones (Murder Drones; AJ DiSpirito)
Crescent Road Night = Temporomandibular Grind (POSTAL Redux Rampage; Running with Scissors)
Luvora Garden Day = Beautiful Dead (Danganronpa: Trigger Happy Havoc; Masafumi Takada)
Luvora Garden Night = A Little Heart to Heart (Team Fortress 2; Mike Morasky)
Crescent Keep Day = Seems you got Telefragged (Nullscape; DIGITAL DESCENDENCE)
Crescent Grove Field = Clanky Must Live (Night in the Woods; Alec Holowka)
Crescent Grove Battle = Clanky Must Die (Night in the Woods; Alec Holowka)
Colosso = Guns Blazing (UNDERTALE Yellow; MasterSwordRemix, MyNewSoundtrack)
Valdur = Second Warning (Library of Ruina; Project Moon/Studio EIM)
Tuul Valley / Sanctum Arena = Battle Theme (FNaF World; Leon Riskin)
Tuul Enclave = Scrombled (Super Lesbian Animal RPG; beatrix quinn)
Bularr Fortress = Boss Battle (Persona 2: Eternal Punishment; Kenichi Tsuchiya)
Galius = Boss Battle (Persona 2: Innocent Sin; Kenichi Tsuchiya)
Gate of the Moon Day = Snow World (Yume Nikki; KIKIYAMA)
Gate of the Moon Night = Quiet (Cave Story; Studio Pixel)
Wall of the Stars = White (Cave Story; Studio Pixel)
Trial Of The Stars Day = Eleventh Hour (OneShot; Nightmargin)
Trial Of The Stars Night = Ever Higher (DELTARUNE; Toby Fox)
Victory = Story 5 (Lobotomy Corporation, Limbus Company; Project Moon)