1.21 Gigawatts
Objective: Acquire Poseidon's Rage

Rocking Out
Objective: Acquire Medusa's Gaze

Bolt Action
Objective: Acquire Zeus's Fury

Sword Man
Objective: Acquire Blade of Artemis

Soul Search
Objective: Acquire Army of Hades

Matador
Objective: Win the first Minotaur fight

Scape Goat
Objective: Win the first Satyr fight

Roll Over...and Die
Objective: Win the first Cerberus fight

Don't They Ever Shut Up!
Objective: Defeat the Desert Sirens

Beat a Dead Horse
Objective: Complete the Centaur sacrifice to Hades

Kickboxer
Objective: Complete the Spike Room Box Puzzle

Rockin' the Boat
Objective: Complete the Sex Mini-Game

Don't Leave Her Hanging
Objective: Rescue the Oracle with 10 seconds to spare

Get the Ball Rolling
Objective: Complete the Challenge of Atlas

Totally Baked
Objective: Complete the Human Sacrifice

Splash
Objective: Kiss the Nyad

Get Me a Beer Kid
Objective: Free yourself from the depths of Hades

Zero Health
Objective: Open a Health Chest when your health meter is already full

Getting My Ass Kicked
Objective: Die enough to get offered Easy Mode

Hitman
Objective: Get a 100 Hits Combo

Silver:

Kratos' Marble Collection
Objective: Collect all the Gorgon Eyes

Stick it in Your Cap!
Objective: Collect all the Phoenix Feathers

It's the HUGE One
Objective: Retrieve the Captain's Key

Take the Bull by the Horns
Objective: Defeat Pandora's Guardian

God Killer
Objective: Kill Ares

Head Hunter
Objective: Obtain the head of the Architect's wife

The Power to Kill a God
Objective: Retrieve Pandora's Box

Hitman 2
Objective: Get a 200 Hits Combo

Legend of the Twins
Objective: Watch the 'Birth of the Beast' Treasure

Seeing Red
Objective: Max out all Weapons and Magic

Gold:

Prepare to be a God
Objective: Beat the Game on any Difficulty

You Got the Touch!
Objective: Climbed the Spiked Column in Hades without taking damage

I'll Take the Physical Challange
Objective: Complete the Challenge of the Gods

Speed of Jason McDonald
Objective: Beat the game in under 5 hours on any Difficulty

Key to Success
Objective: Collect all of the Muse Keys

Platinum:

Trophy of Zeus
Objective: Unlock all God of War Trophies