Updated: October 22, 2026
We added the latest codes to our list.
If you enjoyed Gym Star Simulator, Project Iron offers another way to build your physique and work toward bodybuilding glory. Train specific muscle groups, improve your genetics, and hit the track to develop your athlete. Use supplements and equipment to get more out of your workouts, then put your gains to the test in bodybuilding shows. Don’t forget to use Project Iron codes before heading to the gym!
All Project Iron codes list
Fast-track your looksmaxxing routine by redeeming active Project Iron codes for free Rerolls. Customize your genetics, height, weight, frame, and stats to build the physique you’re after and stand out at the gym. If you need more gym-related games, check out our Gym League codes article!
Active Project Iron codes
- REROLLS—Redeem for 50 Rerolls (All Categories) (New)
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- EXPANSION—Redeem for 50 Rerolls (All Categories)
- ARMWRESTLING—Redeem for 15 Rerolls (All Categories)
- OPTIMIZATION—Redeem for 35Rerolls (All Categories)
Expired Project Iron codes
- TARNISHED
Related: Ultimate Gym Game Roblox codes
How to redeem Project Iron codes
Follow these steps to redeem your Project Iron codes:
- Launch Project Iron in Roblox.
- Click the Codes tab.
- Paste your code into the Enter Code box.
- Hit Redeem to obtain your free rewards.
Project Iron official Wiki, Trello board, and Discord server information
Head over to the IronGrid Games Discord server to chat with players, share your stats, and track fresh code releases and sneak peeks. If the developers launch a Trello or Wiki, we’ll update this guide right away with those links.
Visit our Roblox Codes hub to unlock rare loot, experience boosts, and free resources for the most popular Roblox games.
