Update: Call of Duty: Warzone no longer has a kill door. This was a bug and has now been fixed. Players could run headfirst into the Salt Mine door and survive the encounter. For now, the door is back to haunting only developers.

Original story (June 20, 2021): a Call of Duty: Warzone player on Reddit discovered a bug that caused instant death when touching certain doors in salt mining facilities. Other players have also experienced the wrath of the killer door.

The video (embedded below) reminds me of being able to fake banging your head against a wall in theater class. The player lunges head first toward the closed door and then staggers and jumps off the door. However, instead of discreetly shielding the blow with their arms, they are now on the floor dying and in need of resuscitation. (Just like when you botch that act in drama class.)

In the Reddit thread, no one is quite sure why this is happening. Some have suggested that it may have something to do with the doors being open instead of closed in previous updates, or it may have something to do with the "red door" (the door that allows you to move around the map at a moment's notice). The idea suggested was that if there was a red door elsewhere in the room, the regular doors would not work. However, it still seems a bit harsh, since these doors will kill you headlong having tried.

Doors are a developer's nightmare, affecting a surprisingly large number of virtual states, even though they are so simple in reality. Line of sight, AI walking paths, ballistics ...... Notice if you walk through a closed door (or not through an open one). When a bug causes all the doors in the game to open at once, as happened at one point during the development of The Witcher 3, it becomes harder and harder to program.

In other words, doors are prone to bugs, and in a live service game like "Warzone" with frequent updates, bugs are easy to implement. Perhaps it was inevitable that the doors would not only cause deep stress to developers, but also try to kill players.

This is not the first time strange things happen in Warzone: bugs such as invisible helicopters and holes in the map have been reported often in the past.

Thanks, Kotaku.