Kill the Poseidon Princess

Kill Hermes and acquire his Boots

Cover Kratos in 500 buckets of blood by killing the enemies

Kill Hades

Discover the secret 'Hades Arm' room

Acquire the Bow of Apollo

Completed the "House of the Ned" mission

Killed the Vault Boss

Discovered Eridian Promontory

Get 100% kills on any floor on Don't Hurt Me or harder

Killed Flynt

Perform a Leap of Faith from the Top of Florence's Giotto's Campanile.

Break out of Abstergo.