In-game pickup line
“Explore the other side”
Mechanics
What Red Key does
- Using it at a valid doorway creates an adjacent red room.
- A red room may have a special room type, opening more routes and rewards on that floor.
From the game files
Recharge
Standard recharge4 room clears
Standard room-clear recharge. Batteries and other effects can change how quickly it refills.
Achievement #415
How to unlock it
Open Mom's Chest in Home.
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
Look for a valid door outline on the wall before using a charge.
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. Charge and pickup values shown above also come from the extracted items.xml.
