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- Base Key - Given to Strifeguy by Rowan, allows access to Irale's store, and The Front Base
- Govs Key - Received from Macil after first meeting, allows access to Governor Mourel's Mansion
- Pass Card - (Optional) Governor Mourel gives this to Strifeguy upon accepting the "I'm not squimish" mission. Grants entry to the Power Station
- Prison Pass - Governor Mourel gives this to Strifeguy upon return after one of his missions is complete. Opens the Prison gate.
- ID Badge - Optional Key from Prison Guard, drops upon his death, gives access to Warden Montag.
- Prison Key - Key dropped by Warden Montag upon death, allows entry into majority of Prison, any key slot that is yellow in the Prison works.
- Severed Hand - Taken from Judge Wolfnick, allows Strifeguy to use hand scanners and free the prisoners.
- Pass Card - Received from Macil if Strifeguy doesn't have the Pass Card after the Prison Mission. Grants entry to the Power Station.
- Power1 Key - Given by Worner during Macil's Power Station Mission, allows access to Reactor Core Sector of the *Power Station.
- Power2 Key - A Technician gives this to Strifeguy, allows access to Western Reactor Core Sector of the Power Station, and a technician who drops the Gold Key.
- Gold Key - Dropped by a Technician who talks about new weapons. Allows access to weapons cache in Warehouse Sector of the Power Station.
- Power3 Key - Given by Sammis to Strifeguy, used to gain entry to the Reactor Core, and opens Sewer Gate.
- ID Card - Dropped by two Red Acolytes in The Sewers, Used to open Storage Sector in the Sewers, contains Grenade Launcher.
- Silver Key - From False Programmer in the Audience Chamber, opens cache in Old Front Base, and in the Audience Chamber, and access The Programmer's Keep.
- Oracle Key - Dropped from Two Red Acolytes in the Borderlands, allows entry to The Temple Of The Oracle.
- Military ID - Given by Keymaster after the Oracle gives its permission. Opens gates to Bishop's Sector of Borderlands.
- Order Key - Dropped by Gray Acolyte in Bishop's Sector of Borderlands, and Red Acolyte in The Bailey. Allows access to Fortress: The Bailey.
- Mauler Key - Dropped by Gold Acolyte in The Fortress: Store. Allows access to a Mauler.
- Core Key - On pedestal in NW Fortress: Administration, allows access to central computer.
- Brass Key - Given by Macil after killing the Oracle, gives access to Order Commons.
- Catacomb Key - Given by Richter, grants entry to the Catacombs.
- Mine_Key - Found under a Spectre in Catacombs: Ruined Temple, opens Mines.
- Factory Key - Found under a Spectre in Catacombs: Ruined Temple, opens Factory Receiving.
- Blue Crystal Key - Found in Factory: Conversion Chapel, allows access to Convertor.
- Chapel Key - Found in Factory: Conversion Chapel, allows access to Convertor.
- Red Crystal Key - Found in Factory: Conversion Chapel, allows access to Convertor.