Hopeville Silo - level security codes
They can be found in the Hopeville missile silo bunker
Hopeville Silo - 2nd level security codeEdit
Inside an Easy locked desk on the bottom level inside the silo with the rocket, behind some ruined stairs. It removes the lock on the security control level two terminal, one level up.
Hopeville Silo - 1st level security codeEdit
The other is inside a Hard locked desk in the Operations room on the second level. It removes the lock on the base commander's terminal in Martin Retslaf's office, top level.