When you beat the game and start a new one you will probably notice the sword next to the mode you beat it in and if you start a new game and use the bonus play you will notice that if you are using the barbarian hammer while you are putting your godly power into the blade of Olympus(when you are pulling it out and it drains your health magic and exp)you will have to use the weapon selected thus meaning if you have the hammer while taking it out you will be stuck with it for EVA!