Working Project RER Codes
Last updated August 20, 2026
No working codes right now
We're tracking Project RER and will list codes here the moment the developers release them. If you spot one first, send it our way below.
How to redeem codes in Project RER
- Launch Project RER on Roblox.
- Look for a Codes, Shop or settings button — usually on the side of the screen.
- Paste the code exactly as shown above. Codes are case-sensitive.
- Press redeem to claim your reward.
Codes expire without warning — if one fails, it was almost certainly pulled by the developer.
Found a code we're missing?
Submit it and we'll verify it before it goes live.
About Project RER
This game is based on the central section of the RER A, B, C, D, E in Paris, France. Closure may occur to correct a major issue. Don't insult other players and respect railway signage. *If you experience lag, I strongly advise you to join a private server.* Have fun! tags : sncf, train, simulator, france, simulator, ratp, metros, subways, commuter rail, suburban train, mass transit, RER, île-de-France, paris, transilien, simulation, idfm, parisian RER, railway, idfm