All keys
Mysterious Key O
Opens: Mysterious Room O (red O marker), houses east of the Mercenary Camp.
In-game text: “A mysterious key engraved with a strange marking that resembles the letter O.”
Key data
- Map
- Farm Town
- Uses
- 10, then it is used up
- Key Registration Device
- Cannot be registered
- Key Case
- Fits
- Base value
- 253,228
- Chinese name
- 神秘钥匙O
Where to get it
- Farm Town Mysterious Merchant 253,228, 50% stock chance
- Black Market
- Fixed spawn point in Ground Zero (20% at its spawn point)
- Shotgunner low-chance drop
- Boss drop: Shotgunner, 7% chance
