The most crates of any blue puzzle plus a red card — but scientists guard the rooms and hit hard, and it's an exposed, high-traffic spot. Doable solo with care.
| Keycards | Blue |
| Fuses | 1 electric fuse — looted only, bring a spare |
| Radiation | Cited around 25 (some sources ~22); likely reduced post-rework. Bring rad protection to be safe. ⚠ verifying |
Enter the 3-story building and flip the middle switch on the first floor.
Climb to the top floor and flick the switch on the outside balcony.
Go into the adjacent building, up the first flight.
In the back-right corner, place your fuse in the box and flip the switch beside it to start the timer.
(Optional) Continue up to the Green door and swipe for bonus loot.
Go to the Blue door, swipe, and take the loot — the Red keycard is inside.
📷 Screenshots coming for these spots:
Keycard-door loot respawns every 30 minutes — far faster than open crates, so a puzzle you can reach is renewable income.
One down — here's the rest of the ladder.