|The closed door.|
The ending was added in the HD Remix; it was inspired by a glitch in the original mod, where the player could backtrack into the room before the door closes, trapping them in the room.
Obtaining The Ending
Close the door to Stanley's office. To close the door, the player must USE it in Stanley's Office. Closing the door after exiting the office will not grant you this ending; you must be inside the office for it to occur.
The Narrator will comment on Stanley's inability to make decisions for himself and indirectly insinuates about his cowardice. Stanley decided to stay in his office, no matter what will happen. The game will restart after a bit more dialogue.