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SCP SL C.A.S.S.I.E MTF Announcement Button

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Press it the moment the Mobile Task Force storms in to save the day

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About this sound

This 29-second clip is the C.A.S.S.I.E automated voice announcing the arrival of the Mobile Task Force in SCP: Secret Laboratory, delivered in a calm, robotic facility-wide broadcast tone. It feels tense and official, like a lockdown alert breaking through the chaos of a containment breach. It comes from the multiplayer horror game, where the announcement signals MTF reinforcements entering the facility.

How to use this button

Play it as your squad enters a match to announce the rescue team has arrived.
Drop it over a video edit when the heroes finally show up to turn the fight.
Use it in a roleplay stream when the facility lockdown lifts and backup walks in.
Trigger it during a tabletop game when reinforcements arrive to save the players.

Where people drop it

TikTok
Add it to an SCP edit when the MTF arrives to flip a losing run into a rescue.
YouTube
Use it as the intro sting for an SCP: Secret Laboratory gameplay video or lore breakdown.
Discord
Post it in your SCP server chat when your squad announces they are joining the round.
Twitch
Play it live on stream when your team calls in MTF backup during a tense round.

Pro tip

Time it to the exact frame your characters enter on screen, so the announcement feels like it is calling them in rather than playing over unrelated footage.

Good to know

Place it at the turning point of an edit, after a danger alarm and before the action peaks. Follow it with an enemy spotted call as the rescue team enters, then cut straight to the fight itself.

FAQ

Can I use the SCP C.A.S.S.I.E announcement as a ringtone?

Yes, save the MP3 and set it as your ringtone in your phone settings, so the MTF announcement plays when someone calls you.

What should I pair the C.A.S.S.I.E MTF announcement with in an SCP edit?

Pair it with a danger alarm before it and a fight or gunfire sound after it, so the announcement marks the moment the rescue team takes over the scene.

Is the C.A.S.S.I.E MTF announcement good for announcing my friends joining a game?

Yes, it works well when your friends join a match or a voice channel, because the announcement makes their arrival feel like a planned rescue team entrance.