In Game
The following Soundtracks are played in-game.
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Plays while in Heavy Containment Zone.
Plays while in Light Containment Zone.
Plays when you've been alone for over 2 minutes.
Plays while in Surface Zone.
Plays on the main menu after selecting the "Classic" track in the settings.
Plays on the main menu after selecting the "Retro" track in the settings.
Plays when Chaos spawn. Only heard by Class-D and other Chaos.
The main theme of SCP SL. Does not appear in game, but multiple remixes of it do, such as during Light Containment Zone decontamination.
Plays as the default Main Menu Theme
Plays in the elevators that connect Light and Heavy Containment Zones.
Plays on the main menu after selecting the "Track 1" track in the settings.
Plays on the main menu after selecting the "Track 2" track in the settings.
Warhead Theme
The theme used for the Alpha Warhead was borrowed from theme "Ajoura - The SCP Foundation Main Theme" made by Ajoura. Only a snippet of the song is used in-game. From 0:47 to 2:20. The theme can be viewed by clicking here.
Miscellaneous
Miscellaneous themes, these include themes of Holiday Events or themes of trailers/teasers, excluding the Megapatch II Trailer theme as that was just Final Flash of Existence.
The Parabellum Update (11.0) trailer theme.
The Ghostlight Teaser theme.
The Halloween Event 2021 Theme.
The Xmas Event 2021 Theme.
Removed/Unused
Played when you been alone for over 2 minutes. Replaced by "Massive Labyrinth". Incorrectly listed as "Playing when you are the last person alive on your team" on the Official Northwood Youtube Channel
Played when connecting to a server in the Megapatch II updates only.
Unused. Is considered the main theme for SCP-079.
Unused. Is considered the main theme of MTF.