Quit messages

When the player attempts to exit Doom, a humorous quit message is shown. The message is chosen randomly out of a pool of seven, different for each game. The player must then confirm that they want to exit, by pressing 'Y'.

Extras
When the Doom source code was released, the following extra quit messages were found in the source. It has been speculated that these were intended for use in Final Doom; however, they never appeared in any version of Doom officially released by Id. It is possible that their overtly offensive nature is the reason for this.