10 keys found in the Marathon database.
Unlocks secured rooms and containers in the Perimeter zone. Found on defeated enemies and in hidden caches.
Unlocks secured rooms and high-value containers in Dire Marsh. Required for certain event areas.
Unlocks high-security vaults and restricted areas in Outpost. Extremely valuable and heavily contested.
Special keycard required to initiate the Lockdown event in Dire Marsh. Insert into the terminal near the red force field.
