Story related, can’t be missed.
*** Spoiler - click to reveal ***Scylla the legendary sea monster in Atlantis summoned by Poseidon - the God of the Seas and Patron of Atlantis. This fight takes part in 3 phases.
Boss Fight - Scylla’s attacks:
Tentacles Combo: A standard three hit combo wither her tentacles.
Claw Smash: Slams the ground with her claw.
Offspring: Simultaneously releases small spider-like offspring, Scylla Brood, to attack their prey.
Bite Combo: Standard two bite combo attack.
Phase 1:
During this phase Scylla will use her Tentacle Combo attacks to attack you. Simply hold the L1 Button button to block these lashes and run up towards her and perform a basic Blades of Athena combo attack. While attacking her she'll use her Claw Smash attack in an attempt to crush you, however you can parry this attack by pressing the L1 Button button at the right timing. Rinse and repeat these steps over again until she runs to the other side of the field.
Phase 2:
During this phase Scylla will summon her offspring, Scylla Broods, who are capable of grabbing you and shooting acid at you from long range. If they grab you you'll have to press the L1 Button + R1 Button buttons repeatedly until you're free. I suggest you kill her offspring by spamming the grab move with the Circle Button button. While you're facing her offspring Scylla will be attacking you with her Bite Combo attack. So be sure to keep an out on her and simply block her biting attacks. Rinse and repeat these steps over again until she once again returns to her original starting position.
Phase 3:
During this final phase, Scylla will become more ferocious with her attacks, however, this is still the same phase as Phase 1. So repeat what you've done in phase 1 over again but be sure to block a lot this time. Once she collapses, jump up on the platform to your right and operate the crank wheel by pressing the Circle Button button and then repeatedly tab the Circle Button button to lower the crank into its jaws. Now quickly press the prompted Circle Button button again to complete the QTEs that follow.
All credit goes to orginal authors at playstationtrophies.org, and this is merely updating truetrophy fans with these guides.
http://www.playstationtrophies.org/game/god-of-war-ghost-of-...