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John Romero's head on a stick is the "boss brain" but it is a different thing, the invisible monster spawner, that plays the wakeup sound.

A_BrainAwake is a code pointer used in the normal animation for the monster spawner.

A_BrainAwake is activated when the monster spawner observes the player for the first time. It initializes the internal table of boss targets that are used by A_BrainSpit when firing spawn cubes. Secondly, it plays the DSBOSSIT sound effect, the infamous backmasked message of "To win the game you must kill me, John Romero".


The A_BrainAwake code pointer appears in the following states in Doom's state table:


The following is an example of how to set the A_BrainAwake code pointer in a DeHackEd file:

Pointer 21 (Frame 34)
Codep Frame = 785

Or using BEX syntax:

Frame 1234 = BrainAwake

External links[edit]