diff --git a/Resources/Audio/Lobby/Undefined_Theory.ogg b/Resources/Audio/Lobby/Undefined_Theory.ogg
new file mode 100644
index 00000000000..c567ac17a05
Binary files /dev/null and b/Resources/Audio/Lobby/Undefined_Theory.ogg differ
diff --git a/Resources/Audio/Lobby/attributions.yml b/Resources/Audio/Lobby/attributions.yml
index af8782fa09e..8059e3f4cde 100644
--- a/Resources/Audio/Lobby/attributions.yml
+++ b/Resources/Audio/Lobby/attributions.yml
@@ -112,4 +112,9 @@
   license: "CC0-1.0"
   copyright: "Get It Done by A-Guy, converted from mp3 to OGG"
   source: "https://github.com/A-Guy173/Music/blob/main/getitdone.mp3"
+
+- files: ["Undefined_Theory.ogg"]
+  license: "CC0-1.0"
+  copyright: "Undefined Theory by A-Guy, converted to OGG"
+  source: "https://www.youtube.com/watch?v=FIOs2t84MKo"
   
\ No newline at end of file
diff --git a/Resources/Prototypes/SoundCollections/lobby.yml b/Resources/Prototypes/SoundCollections/lobby.yml
index 791fa42cf75..b98a56a1e55 100644
--- a/Resources/Prototypes/SoundCollections/lobby.yml
+++ b/Resources/Prototypes/SoundCollections/lobby.yml
@@ -24,4 +24,5 @@
     - /Audio/Lobby/Black_Heat.ogg
     - /Audio/Lobby/thestation.ogg
     - /Audio/Lobby/Get_It_Done.ogg
+    - /Audio/Lobby/Undefined_Theory.ogg
     
\ No newline at end of file