Big MT west tunnel
The entrance leads to a subway tunnel. To the right of entrance is a door (easy) to a small room, and the next two doors to the right lead to a network of maintenance tunnels filled with protectrons scaled to the players level, along with a unique protectron named The Custodian. The tunnels end with a locked door (hard) that leads into a subway tunnel, which is caved in on both ends.
- Recipes - Unarmed skill book Through the locked door (easy) to the right of the entrance
- Main Computer Upgrade: LAER Mod "Auxiliary Recharger Chip" Heading down along the entrance, take a right at the second door, then go straight through the doorway ahead. The Upgrade is on a shelf wedged between a duffle bag and the side of the shelf on the left side of the room.