Got A rank in The Agitated Five Kage Summit.

Used rear attack feature in a mob battle.

You cleared the prologue.

Got S rank in The Nine Tails' Attack.

Unlocked a Secret Factor.

Complete the game on Hard Difficulty

Complete the Screw of Archimedes without getting hit by the Fire Traps

Slow 100 Enemies with the Amulet of Uroborus

Complete the slide in the Statue of Apollo without dying

Collect all Artifacts in the game

Completely Upgrade Kratos

Reconstruct all of the Decayed Chests