The standout solo run: the only blue-card puzzle with no green-card prerequisite, no scientists reported, and a red card plus ~6 crates. The long sprint from fuse to door is the only real friction.
| Keycards | Blue |
| Fuses | 1 electric fuse — looted only, bring a spare |
| Radiation | Historically ~25 rad protection; recent reworks may have reduced it. Bring light rad protection and verify on your server. ⚠ verifying |
Enter the central building through the blast doors — hold E on the wheel to raise them enough to duck under.
Head upstairs, place your fuse in the box on the left, and start the timer.
Cross to the separate building and go to its second floor.
Swipe your Blue keycard at the door and grab the loot — the Red keycard is on the office table in the innermost room.
To get out, hit the switch in the back office to power the exit door.
📷 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.