Wake up in the M.E.G. bunker
Make sure this is actually the step you are on. If an item or prompt is missing, backtrack one room and check the inventory first.
Start Requirement: Clear Level 55.1 First
Level B does not open from a normal Hub doorway. The unlock route starts after you finish the main story path that leads through Level 55.1. When the handoff works correctly, you wake inside a small M.E.G. sleeping room instead of loading back into a standard level corridor.
Use that wake-up room as your first route check. If you are still holding the camera in Level 55.1, standing in Hub 3999, or walking through a regular Backrooms hallway, you are not on the Level B unlock path yet. The correct run begins when you can leave the sleeping room and step into the M.E.G. Bunker interior.
Step 1: Leave the M.E.G. Sleeping Room
After the transition, turn toward the door in the sleeping room and open it. This moves you into the M.E.G. Bunker, a controlled facility area where the main progression check is access control, not stealth or entity management.
Fast route check:
- You wake in a sleeping area used by M.E.G. members.
- The first usable door is directly in or near that room.
- The next space looks like a bunker facility, not a normal Backrooms loop.
Step 2: Use the ID Card Doors
Inside the bunker, progression is gated by ID card access. Walk up to the card reader, swipe the card, then press C when the door interaction is available. If the door does not open, stay on the reader and repeat the interaction instead of leaving the route.
This section is easy to overthink because it looks like a new level hub. It is really a controlled access chain. Your job is to keep moving door-to-door through the bunker until the route splits between the Level 931 portal branch and the elevator path.
Step 3: Identify the Level 931 Portal
After the first access door, you reach another card-locked door leading toward the supermarket route. That branch is the Level 931 portal. If your immediate goal is Level 931, take this supermarket path.
For a Level B unlock run, treat the Level 931 door as a landmark. It confirms you are in the correct hidden-level access area, but it is not the same exit as Level B. The Level B route continues through the bunker elevator path.
Step 4: Take the Elevator Toward Level B
The final key object is the bunker elevator. This elevator connects the bunker route with Hub 3999 and the hidden level path that starts with B. After you confirm the Level 931 branch, use the elevator route to continue toward Level B.
The clean checklist is simple: clear Level 55.1, wake in the M.E.G. sleeping room, open the bunker door, swipe the ID card doors, identify the Level 931 supermarket portal, then take the elevator route for Level B. The main failure point is routing confusion, not combat, so move slowly enough to confirm each doorway before committing.
Escape the Backrooms: How to Unlock Level B (The M.E.G. Bunker) & Level 931 Portal Video
Video chapters
Player route notes
Things we check before pushing ahead
We use this as the quick “don’t make the same mistake twice” checklist. If your room, spawn, or prompt does not match the video, stop and check the normal route first—patches and co-op timing can make an old shortcut look tempting when it simply will not work.
Explore the bunker hallways
Look around slowly before guessing. Props can hide chairs, switches, notes, and pickups; a second camera angle is usually faster than brute force.
Swipe the M.E.G. ID card
Call out what was pressed, collected, or opened. It prevents the classic “we all thought somebody did it” reset.
Find the path to Level 931
If a skip behaves inconsistently, leave it and take the intended route. A clean run beats getting stuck in geometry.
Multiplayer tips
Use Level B as a regroup point. Confirm supplies, keycards, and the next exit before anyone boards an elevator or opens a route the rest of the lobby has not unlocked.