Acquire Security Tags or interact with terminals to increase your Security Clearance Level. Kill bosses to get more tags and increase your clearance.

• Level 1 — Unlocks scanners which reveal exfil stations and batteries
• Level 2 — Unlocks doors required to access the Control room
• Level 3 — Unlocks Armory access
• Level 4 — Certain vaults require this level
• Level 5 — Unlocks contraband at the bottom of Panopticon and the additional containers in Vault 7

Reach Security Clearance Level 3. Find an Exfil Station and activate it — the actual Guarded Exfil will then spawn on your map.

You have 3.5 minutes to reach it. Only one exfil can be active at a time, so you may need to wait for another team to exfil before activating the terminal.

You need a Marathon Key to open a vault. Each key shows the Power and Coolant required to open that door (e.g. Power: 8, Coolant: 1).

Find batteries to power the Cryo Coolant terminal. Fill Empty Cryo Coolant containers at a terminal on the lowest level of the map in Control.

Frozen areas can be temporarily disabled by shooting the green panels on the walls.