Big Finish is an achievement/trophy in Prince of Persia: The Forgotten Sands.
Description[]
"Defeat an enemy by doing a power attack on the fifth hit in a combo".
Guide[]
A power attack is when you hold down the attack button instead of just pressing it. This one is pretty easy. When it first teaches you how to do this attack just hit the attack button until you count four sword swipes and then hold the attack button for the power attack. The early enemies of the game will die instantly. If you try it when you first learn the power attack, it might be easier to take out the shield guys first or just make sure you don't hit them and end your combo.