Where do I enter my PC pre-order code to get it redeemed?

[KaizokuNinja]

I tried doing it in player data and it comes up invalid. Is there someplace else to do it?

[Rikkore]

Possibly on the steam Games tab... Games > Activate a Product on Steam, then put the code in. Cheers

[KaizokuNinja]

I feel like an idiot, I should have tried that first I don't know why I was stuck on doing it in game. Thank you very much.

[WickedRequiem]

Wow.... I wonder if you'll still get the pre-order bonus costumes.