Sometime after the launch of Metal Gear Solid 5: The Phantom Pain, players discovered a hidden ending that nobody had known existed.

At the time, Metal Gear Solid 5 players assumed it was part of the game’s infamous cut content, but shortly thereafter, Konami revealed that the cut-scene is not cut, and that certain conditions have to be met in order for it to be shown.

The main thing, and something nearly impossible to achieve, is to have all players dismantle every single nuclear device on their mother bases. A service-side tracker looked at each platform individually, and despite players arranging for a mass deactivation of nukes at one point, they never managed to trigger it.

On Friday, the cut-scene was suddenly unlocked on PC. Some assumed this was done as a way of promoting the upcoming Metal Gear Survive, but it turns out, it wasn’t.

Konami confirmed in a series of tweets that not only were the conditions to legitimately trigger the cut-scene not met, the company doesn’t actually know what triggered it. Konami said this only took place on PC, and promised to investigate why this has occurred.

We will share more information as soon as possible, but you can play the game normally and other platforms have not been affected. (2/3) — METAL GEAR OFFICIAL (@metalgear_en) February 4, 2018 Subscribe to the VG247 newsletter Get all the best bits of VG247 delivered to your inbox every Friday! Enable JavaScript to sign up to our newsletter

We would like to apologize for the inconvenience and reassure you that we will investigate the matter as well as take the necessary action to avoid this in the future. (3/3) — METAL GEAR OFFICIAL (@metalgear_en) February 4, 2018

The most likely explanation is that some sort of hack has taken place that allowed the cut-scene to unlocked. We’ll just to wait and see if someone does take responsibility for this event.