Verified for the August 2026 patch · updated Aug 20, 2026
The keycard chain
Every locked door in Rust sits on one progression: green cards start it, red cards end it. Learn the circuit once and every monument on the map becomes a route, not a mystery.
How the chain works
Green keycards spawn on desks at small roadside monuments — no puzzle needed, just walk in and grab them. Take a green card and one electric fuse to any green-tier monument, power the fuse box, flip the switch, and swipe: the loot room behind the green door contains crates and a blue keycard.
Blue puzzles work the same way but need more from you — more fuses, radiation protection, sometimes a green card mid-route. Their reward rooms hold red keycards. Red puzzles are the end of the line: scientist guards, real radiation, and elite crates.
Cards wear out: green and blue last ~4 swipes, red only 2. Seasoned players carry two greens, a blue, and a couple of fuses as a standing kit.
Where it all starts
Desk spawns at roadside monuments. Opens green puzzle doors.
Used at
Where to find a green card →The mid-game card
Found in green puzzle loot rooms. Opens blue puzzle doors.
Used at
Where to find a blue card →The end-game card
Found in blue puzzle loot rooms. Opens the best doors in the game.
Used at
Where to find a red card →Keycards — quick answers
- What order do Rust keycards go in?
- Green → blue → red. Green cards spawn on desks at small monuments. Swiping a green card (plus a fuse) at a green-tier puzzle opens a loot room containing a blue card. Blue puzzles reward red cards, and red puzzles hold the best loot in the game.
- Do keycards break?
- Yes — cards lose condition on every swipe. Green and blue cards last about 4 swipes, red cards only 2. Check condition before a run and carry a spare for anything important.
- Can I skip straight to a red puzzle?
- If you already have a red card (bought at Outpost trades, taken from a body, or found at Arctic Research Base or Large Oil Rig), yes — you don't have to run the chain every time. But the chain is the reliable way to source cards fresh each wipe.
- Do I always need a fuse?
- Almost always at land monuments — the puzzle room is dead until you power it with an electric fuse. The exceptions: Arctic Research Base is pre-powered, and the Oil Rigs need no fuses at all.