Credit goes to cra from x360a;
http://www.xbox360achievements.org/game/bayonetta/guide/To get the achievement, you will have to beat father bolder, here is a quick guide in case you are having trouble with him.
1st phase: He is a real pain if you have trouble with dodging. He throws bubbles at you, which will trap you if you are caught. He can fire projectiles at you, make a satellite fire a laser to destroy your platform and swing his sword/whip of light to give you a hard time. Dodge his attacks until he closes in and forget about large combos. Just go for the Durga's charge attack until his Health is depleted and you can sacrifice your first demon.
2nd phase: He is a bit more aggressive and he throws a building at you, which can be evaded with Y+B. Don't get greedy with your attacks or you pay a high price for it. Finally you can summon the next demon.
3rd phase: Finally, the end is near. During the fight you can catch a satellite with Y+B and be ready to throw it 4-5 times back at Balder until it is too fast for him. After the final climax, this fight is over.