- [ ] 2. Communications Department, near the Mail Room, Executive Sector
- [ ] 3. Computer Terminal Room, near the Mail Room, Executive Sector
- [ ] 4. Above the Break Room and in the Break Room, Maintenance Sector
- [ ] 5. Within the Firebreak near the Janitor’s Office, Maintenance Sector
- [ ] 6. On top of the NSC Power Plant, NSC Power Plant, Maintenance Sector
- [ ] 7. Ventilation Shaft in the side tunnel near the Quarry Entrance, Black Rock Quarry, Maintenance Sector
- [ ] 8. Ventilation Tunnel near the Furnace Chamber and Black Rock Quarry, Maintenance Sector
- [ ] 9. Ventilation Tunnel near the Sector Elevator, Access Corridor, Maintenance Sector
- [ ] 10. Hidden Office, Central Research, Research Sector
- [ ] 11. Lab 10, Central Research, Research Sector
- [ ] 12. Hidden Music Lab at the very top, Central Research, Research Sector
- [ ] 13. Hidden behind the Active Threshold (Control Point), way up high, Active Threshold, Research Sector
- [ ] 14. In a well hidden Ventilation Shaft inside a side tunnel, Active Threshold, Research Sector
- [ ] 15. From the Logistics (Control Point), while facing towards the map with Mail tube lines, look up near the Control Point to find a hidden office, Logistics, Containment Sector
- [ ] 16. Hidden Office near the NYC Subway Sign, Turntable, Containment Sector
- [ ] 17. Unit 8, Floor 5, Panopticon, Containment Sector. Near the Swan Boat, you’ll need to levitate to the hidden location
- [ ] 18. Reach the very end of the Twisted Passage, Twisted Passage, Fortified Unit 716, Floor 4, Panopticon, Containment Sector
- [ ] 19. Hidden Office near the Firebreak, Panopticon, Containment Sector
