Puzzle guides

Every walkthrough leads with what to bring, then the route, drawn as a circuit. Cards escalate: green puzzles reward blue cards, blue puzzles reward red — the chain explained.

GREEN

Green keycard puzzles

• Harbor (Large) Puzzle Guide — Green Card Route easy · 3–5 min · verified August 2026
• Harbor (Small) Puzzle Guide — Green Card Route easy · 3–5 min · verified August 2026
• Satellite Dish Puzzle Guide — Green Card Route easy · 3–5 min · verified August 2026
• Sewer Branch Puzzle Guide — Green Card Route easy · 4–6 min · verified August 2026

BLUE

Blue keycard puzzles

• Airfield Puzzle Guide — Blue Card Route medium · 6–10 min · verified August 2026
• Arctic Research Base Guide — The Easiest Red Keycard medium · 4–7 min · verified August 2026
• Power Plant Puzzle Guide — Blue Card Route medium · 6–9 min · verified August 2026
• Train Yard Puzzle Guide — Blue Card Route medium · 5–8 min · verified August 2026
• Water Treatment Puzzle Guide — Blue Card Route medium · 5–8 min · verified August 2026

RED

Red keycard puzzles

• Large Oil Rig Guide — All Three Card Rooms hard · 20–35 min · verified August 2026
• Launch Site Puzzle Guide — Red Card Route hard · 10–15 min · verified August 2026
• Military Tunnels Puzzle Guide — Red Card Route hard · 10–15 min · verified August 2026
• Missile Silo Guide — Red Card Descent hard · 15–25 min · verified August 2026
• Small Oil Rig Guide — Blue Card Room & Locked Crate hard · 15–25 min · verified August 2026
• Underwater Labs Guide — Card Modules & Loot Route hard · 20–40 min · verified August 2026