HELP! What will my name be on BF3?

Hi and welcome 🙂

Yes, your Origin ID will be your online username in Battlefield 3 on PC. You can change your Origin ID at any time via the Origin client or the Origin store account page. Battlefield 3 utilizes Origin, which means it will show up in your Origin client's game library and you can download/install and launch the game from there. Once you've purchased Battlefield 3 Premium Edition from the Origin store it will be automatically tied to your Origin account (remember to use the same account both in the store as well as the client). Wherever you are, you can always download and install the Origin client, log in with your Origin account and then download and play the game.

Let us know if there are any further questions.