Unlocking hidden treasures in Final Fantasy VII Remake requires dedicated exploration, especially when tracking down Don Corneo's hidden vaults during Chapter 14. Players can initiate this quest line by speaking with Damon the reporter in the Sector 5 Slums before setting off to secure the key needed to open these red gates. Finding all three vaults yields valuable accessories, skill books, and lucrative selling items like specialized tiaras.
How to Unlock Corneo's Vault Key
Before visiting any of the hidden vaults, players must obtain the key by completing the Tomboy Bandit side quest. Track down Johnny at the train station and then follow Kyrie to the church in the Sector 5 Slums. After winning a special arena match at Corneo's Colosseum on her behalf, return to Kyrie to receive the key to all three stashes.
Steel Mountain Vault Location
The first vault is located in the Sector 5 Undercity region near Steel Mountain. Fast-travel or walk north toward the Chocobo Stop in this area to find a distinctive red gate with Don Corneo's dragon insignia. Inside this vault, players can smash multiple Shinra supply boxes and open the chest containing the valuable Ruby Tiara.
Collapsed Expressway Vault Location
The second vault is situated right at the entrance of the Collapsed Expressway. Enter the area from the north side connecting S6-5 and head immediately into the alcove on the left. Unlocking this gate reveals supply crates and a chest containing the Diamond Tiara along with other helpful consumable items.
Old Trunk Line Sewer Vault Location
The final vault requires story progression through the main mission with Leslie in the sewers. After battling through the sewer section and chasing down the mischievous creature, Leslie will lead you toward a exit ladder. Instead of climbing up immediately, flip the nearby water gate switch to drain the flooded Former Disposal Area and backtrack to open the final vault door.
Rewards and Quest Completion
Clearing out the final sewer vault triggers a tough mini-boss battle against the Sahagin Prince and his allies. Utilizing Fire Materia makes short work of these amphibious enemies so you can claim the Emerald Tiara and key gear rewards. Once all three stashes are fully looted, visit Marle in Evergreen Park to wrap up the quest and earn Cloud's weapon manual.
