An easy, no-rad blue card, but the reward room is thin (1–2 crates) — the value is the card itself. Only one Harbor variant (Large or Small) spawns per map.
| Keycards | Green |
| Fuses | 1 electric fuse — looted only, bring a spare |
| Radiation | None — Harbors aren't radiated; basic clothing is fine. |
Small Harbor: find the two-story container marked "D11" opposite the helipad. Insert your fuse in its box and flip the switch beside it.
Small Harbor: go upstairs in that same structure and swipe your Green keycard on the top-floor door — loot the Blue card off the table.
Large Harbor: in the big red waterside warehouse (by the train tracks), find the container marked "D2" (door may be boarded — break it). Insert the fuse and immediately flip the outside switch behind the box.
Large Harbor: follow the cable to a second container marked "H2" under the red hangar — swipe your Green keycard there and grab the Blue card.
📷 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.