An announcement over the intercom in the SCP Containment Breach (I did not type "My Little Foundation: Containment is Magic" because the intercom is a different recording) that is played just after or a few minutes after SCP-173 breaches containment.

Credit me if you use this please.

Keter And Euclid Level

Tf2 Dubstep

Quiet Fright

SCP Alarm Sound (Extended)

Turret Wife Serenade (Remix) by ZipZipper.mp3

Dunderpatrullen never released it on his channel, so I basically just tried to use Audacity to loop it.

Dunderpatrullen - Cosmorot Remix (kuledud3 Outro)

Dead by Daylight (WildCore remix)

Medic Screams To the tune of the Screaming Cowboy Meme after Sniper shoots him.

I actually tried a little bit. 

~Good Ideas, Poor Execution~

Screaming Medic

Grieg - In the Hall of the Mountain King Impossible Piano Remix Black MIDI Sir Spork.mp3

Have you checked the tags? You can if you're on a desktop browser. They might have something important...
But only if you care about the music that I make myself (original songs by me).