In-game pickup line
“Oh no...”
Mechanics
What Montezuma's Revenge does
- Sustained shooting charges a short-range beam that fires behind Isaac when he stops.
- The beam adds damage without replacing Isaac's normal tears.
Achievement #449
How to unlock it
Defeat The Beast as ??? (Blue Baby).
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
Face away from an approaching enemy, then release the fire button when the beam is ready.
Reference
Game data and sources
The item ID, quality and pool listings, icon, game-file tags, and short pickup line come from the extracted Repentance files. This effect explanation is an editorial summary checked against the references below. Repentance+ can differ.
