Alternate costume
Finish the game completely to have a new costume for Asterix available.

Hints & Tips

Beating the Roman Spy
Continually press X until he goes away.

Body Slam
Just press Jump + Triangle to have Obelix preform a body slam to the ground. Note: This does not affect anf of the Bosses.

Beating the Battalion
Jump into the center of the Battalion and constantly press X until they do explode.

Hit enemies with each other
Go near an enemy, hit them just once, then press Triangle. Now Asterix will swing them around. Then have Obelix throw an enemy to you. If timed properly, you can press Triangle and swing another enemy around, hitting the other foe. Then a 10X modifier will come into view.

Beating The Norse Hammer
Pause the game while playing in a battle with the Norse Hammer, then press Square to go beyond the fight.

Throw and hit opponent
Just press L1(2x's) to have Obelix swing and throw a Roman to Asterix. Then hit them before they hit the ground to destroy them right away. Then hit the opponent just after Obelix throws him, and Asterix will glow and a 3X modifier will come into view.