Chrono Trigger Sealed Chests and Doors
Throughout the early portions of the game, you'll see a number of odd black chests, and later some large doors. All of them are "sealed by an unknown power" and nothing you do will open them. Once you've been to the Dark Ages and banished by the Prophet, you will have the ability to open all of these chests and doors. Because there are so many of them scattered throughout the game, I have compiled a list to make collecting them all easier.
In the case of several chests that appear in both the Middle Ages and the Present, you can obtain greater treasures if you take care when claiming them. Though these chests are not in the exact same location in each era, they are close enough. If you open the chest in the Middle Ages before doing so in the Present, you will not be able to claim the chest in the Present. Opening them in the opposite order allows you to obtain two treasures (time paradoxes notwithstanding). However, there is a better third option: when you try to open such a chest in the Middle Ages, you will receive a message that "something inside is reacting to the pendant." Do not open the chest, but instead head to the Present where you can claim an upgraded version of that item. Afterwards, you can return to the Middle Ages and claim the original item as well!
Middle Ages Chests
- Upgradeable chest in Truce Inn
- Chest in Guardia Forest
- Upgradeable chest in Guardia Castle
- Chest in Magic Cave
- Two upgradeable chests in Elder's House (Porre)
- Three upgradeable chests in Northern Ruins (available during Cyrus's Ghost sidequest)
Present Chests
- Chest in Guardia Forest (take the End of Time Gate)
- Upgradeable chest in Truce Inn
- Upgradeable chest in Guardia Castle
- Chest in Heckran Cave (contains two items)
- Two upgradeable chests in Mayor's Manor (Porre)
- Two chests in Forest Ruins (only one can be opened)
- Three upgradeable chests in Northern Ruins (available during Cyrus's Ghost sidequest)
Future Doors
- Main room in Bangor Dome
- Main area in Trann Dome
- Basement in Arris Dome
- Main area in Keeper's Dome