Redeem the new Steel Crossfire codes to claim free shards and boosters, leaving all the other Transformers in the dust. If you've ever wanted freebies in your favorite Transformers-inspired game, our Steel Crossfire codes are here to help. How do I redeem Steel Crossfire codes? To redeem Steel Crossfire codes, all you have to do is follow these steps:Open Steel Crossfire in Roblox. Unlike many codes in Roblox, it doesn't seem to matter with Steel Crossfire codes if you've added a space or got the wrong capitalization.