Observer
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Observers are psionic enemies that spawn stationary within pits. Observers rotate in place with a harmless semi-transparent beam emanating in front of them. If Isaac crosses this beam, the Observer will stop rotating, before firing out a constant purple laser in the direction of the beam. This laser will release a ring of 8 projectiles at the point of contact with a wall or obstacle. The Observer will stop firing for a few moments and resume rotating.
Notes
- The rotation of an Observer is determined by its subtype, with 450.1510 rotating clockwise and 450.1510.1 counterclockwise.
- There is a variation of Observers that does not need to be killed to clear the room and will disappear once the room is cleared, they have the subtypes 2 and 3.
Trivia
- Observers were unused in the initial AB+ release of the Fiend Folio.
- They are referred to as "Pit Sentry" in the game files.
Gallery