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🪖 Rust · Red-Card Puzzle

Rust Military Tunnels Puzzle

Excellent elite loot, but the most dangerous PvE monument in the game: roughly 15 elite scientists with LR-300s and grenades that open doors and flank you. Realistically a geared-group run, not a solo one.

Current as of the October 2025 'Meta Shift' update · cross-checked vs. rusthelp + Rustafied (June 2026)
Quick answer
Needs Green Blue Red Fuse → rewards Elite loot
B worth-it Group · Step-by-step ↓ · Loot ↓
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What to Bring

KeycardsGreen Blue Red
Fuses1 electric fuse — looted only, bring a spare
RadiationAround 25 protection cited for the interior — bring a hazmat.
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Step-by-Step Solution

1

Take the right door at the front entrance.

2

Head right and find the door marked "Armory" on the right.

3

Down the hall, first door on the right — place your fuse in the box and activate the timer.

4

Head back out and down the tunnel as it curves right.

5

Go through the hole in the fence on the left and head left.

6

Swipe your Green card on the door marked "Storage" across the tracks.

7

Head right and flip the switch labelled "Laboratory."

8

Back out and toward the centre — grab the 3 elite crates from the central rail car.

9

Continue down-right to the Blue door marked "Laboratory" and swipe.

10

Behind it is the Red door (short timer) — swipe, loot, and take the quick exit on your left.

📷 Screenshots coming for these spots:

📷Screenshot to add: The right-hand front entrance
📷Screenshot to add: The Armory-area fuse box + timer
📷Screenshot to add: The fence hole + the "Storage" green door
📷Screenshot to add: The central rail car elite crates
📷Screenshot to add: The blue → red door sequence
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Loot & Reward

Keycard-door loot respawns every 30 minutes — far faster than open crates, so a puzzle you can reach is renewable income.

This is a combat puzzle — bring a strong gun, armour, and meds; the scientists are smarter and deadlier than normal ones.
Move fast: the fuse drains in a few minutes and the red door timer is short.

Rust Military Tunnels Puzzle FAQ

How many scientists are at Military Tunnels?
Around 15, and they're the elite kind — they open doors, throw grenades and shoot at range. It's the toughest PvE monument in Rust.
What cards do Military Tunnels need?
All three — Green, Blue and Red — plus a fuse. The reward is 3 elite crates in the rail car and another 3 in the red room.

More Rust puzzles

One down — here's the rest of the ladder.