Game Audio

Lobby

 * Valeriy Antonyuk - Emptiness
 * Nicolas Boscovic - Snow Cocoon
 * Emptiness (No Melody)
 * Calm Waters

Worlds

 * Pixelmon - Distant Shores (Starting Area)
 * Chipzel - 06 Step Right Up (Sandy Canyon)
 * Super Meat Boy - Forest Funk (Mount Whirl)
 * Sonic Mania - Press Garden Act 2 (Stone Sanctuary)
 * Megaman X - Sting Chameleon (Arranged) (Lush Canopy)
 * The Binding of Isaac - Outside the Fold (Violent Volcano)
 * Seth Parker - Frosted Peak (Gingerbread Glaciers)
 * Chrono Trigger DS - Battle (Elemental Heights)
 * Sonic 3 - Ice Cap Zone Act 1 (Chill Hills)
 * Super Meat Boy - Can o' Salt (Crystalline Caves)
 * Scattle - Inner Animal (Mechtropolis)
 * Mega Man 11 - Impact Man Stage Theme (Atomic Factory)
 * Hacknet - Malware Injection (Droids HQ)
 * Hacknet - Panic Track (Raider Protocol)

Special Rooms

 * Kubbi - Ember (Shop)
 * Kubbi - Firelight (Forge)
 * Kubbi - Cascade (Laboratory)
 * Kubbi - Compass (Library)
 * A Shellin the Pit - Trilobyte (Vault)
 * Modulogeek - Grace (Altar)
 * PMD2 - TEMPORAL SPIRE - Orchestral Remix (Final)

Bosses

 * Bug Fables - MECHA BEE DESTROYER BLASTLORD (Overclocker)
 * Mega Man 11 - Tundra Man Stage Theme (Hypercooler)
 * Chipzel - (5-2) Power Cords Remix (Voltmage)
 * Bossfight - Be Gone Mr. Gawne (The Hoarder)
 * The Binding of Isaac - Ascension (The Dark One)

Special
Players will be unlikely to discover these soundtracks if they play the game normally.
 * Wastelands (Wicked Wasteland)
 * The Caretaker - K1 - Stage 5 Advanced plaque entanglements (RXJyb3I=/Respite)
 * Infinite Darkness (Defeat a boss.)
 * The Binding of Isaac - Nativitate (The Darkness)
 * zero-project - Gothic (2020 Version) (Blood Moon)

Old Soundtracks
These soundtracks can only be heard in the older versions of the game.
 * BattleBlock Theater - Secret Area (Reset before starting the game)
 * Bossfight - Jack Russel (Mount Whirl)
 * Sting Chameleon Stage - Mega Man X (Lush Canopy)
 * Pokemon Super Mystery Dungeon - Lush Forest (Lush Canopy/Lush Jungle α)
 * Sonic Mania - Flying Battery Zone Act 1 (Elemental Heights)
 * The Binding of Isaac - Innocence Glitched (Chill Hills)
 * The Binding of Isaac - Caves Theme (Crystalline Caves)
 * Megaman 4 - Cossack Stage 3 (RushJet1 Cover) (Atomic Factory α)
 * The Binding of Isaac Antibirth - Foreigner in Zeal (The Darkness)
 * The Binding of Isaac - The Thief (Altar)