- Travel to the Nation Guard Depot.Go inside once you discover it.
- Travel around inside.Completely circle around the training wing and the offices.
- Exit the offices back into the main room you first enter.An electrical switch should appear along the wall 15 feet to the left.
- Flip the switch.This will unlock the door to the utility room two stories below you.
- Enter the utility room.Destroy the Sentry Bot that's waiting for you inside.
- Locate a second electrical switch inside the utility room and flip it on.A trap door will open, revealing the entrance to the armory.
- Go down into the armory.Enjoy your spoils.
- Bring along some heavy weapons. There will be more than one hostile robots inside.
- The switch will not appear until you completely circle through both the training wing and offices.
- You cannot pick the lock on the armory door.