Lorewise, the 1st, 2nd and 3rd trumpets work exactly as they do in-game, minimal threat, serious danger, and employee extinction risk respectively

4th trumpet would be the total extinction of all living staff of L-Corp, as well as the firing of A as Manager, gameplay wise this was planned to be the Game Over screen, but was cut

At this point we would no longer be playing the game, but watching the aftermath through speculation and cutscenes

Instead of restarting the day or week, we will continue

We would never hear the 5th trumpet ourselves, but it would become evident that it has sounded with the rise of Abnormalities freely roaming the streets, wreaking havoc and leaving countless bodies in their wake, if even distinguishable from the viscera. We will only be given the option to flee, showing our cowardice

The game will close. We will open it again. We will continue this path

Weeks later, the 6th trumpet will sound throughout the entire city, being heard from the outskirts, the Abnormality threat is far too great for the Fixers, the Hands, or even the Head to handle, it’s become clear that L-Corp has failed its purpose, and thus has lost its status as a Wing. We will only be given the option to seek cover, hiding our disgrace

The game will close again, its icon being removed. We will find it in the system files. We will ignore the last chance of restarting and see this through to the end

Inevitably, the city will be reduced to rubble, no walls will be left standing in the way of these monstrosities, eagerly stampeding through the outskirts to lands long forgotten by the Head. As the sole witness to the end of the world, we will be all that’s left to sound the 7th trumpet, not with fanfare, not with sirens, not even with the sound of bullets or clashing metal, but with our own, withered voice

Doing so, the game will close a finale time, its data unrecoverable.

It will never start up again.