Bloodstained: Ritual of the Night has several hidden rooms for players to discover, and four of them require special keys to enter. The Carpenter's Key, Celeste's Key, Millionaire's Key, and Warhorse's Key all must be collected before these hidden rooms can be accessed. However, these keys are hidden all across the in-game map, usually in places far away from where the corresponding rooms can be found. Fortunately, we've got all location of all keys in Bloodstained: Ritual of the Night outlined below.
Bloodstained: Ritual of the Night | All key locations
To earn 100 percent map completion in Bloodstained: Ritual of the Night, players must find all hidden keys and open all hidden rooms. As such, they'll need to track down four distinct keys, one for Celeste's Room, one for the Carpenter's Room, one for the Millionaire's Room, and one for the Warhorse's Room. Here are the locations of each key.
The key to Celeste's room can be found in the Hall of Termination, in the room just east of Iga's room. It's among a set of treasure hidden just beyond a breakable ceiling in the room with the entrance to the save and teleporter rooms. Break through the ceiling, then open middle of the three chests to claim Celeste's Key.
The key to the Carpenter's Room is found in the Dian Cecht Cathedral, not too far from the Celeste Key location. It requires players to use the Invert ability in the tall room due west of the Hall of Termination. Invert to reach the ceiling, then invert again and claim the green chest on the left side to discover the Carpenter's Key.
The key to the Millionaire's Room is found in the Den of Behemoths. After first using the portal to the area, drop down into the massive room and head to the right. About halfway in, use invert to reach the ceiling, then double back toward where players just dropped in. The chest containing the Millionaire's Key will be just a short distance away from the entrance.
The key to the Warhorse Room is found in the Glacial Tomb, the game's final area. It's found at the far west end of the area's top hall, situated neatly between the game's final two bosses. Simply enter the room, take out the enemy, and open the chest to claim the Warhorse's Key. Given that this area can't be accessed until the story is nearly over, players shouldn't head into the Warhorse Room until their hero is suitably powerful.
Players will likely have discovered all hidden keys by the end of Bloodstained: Ritual of the Night. After all, the four rooms must be accessed before the map can be 100 percent complete. If you're in a rush, though, use the details and maps above to find each of the game's hidden keys and rooms. To learn even more about the latest and greatest Igavania release, browse through Shacknews' collection of Bloodstained: Ritual of the Night game guides.