Start going to your right and head up to the platform. Open the Red chest to get Red Orbs that you can use to upgrade your weapons. You will find a lot of chests throughout the game; Red Chests contains Orbs, Green contains healing orbs, and the Blue contains magic orbs.
Make your way through the top but there will be some resistance waiting for you. Prepare yourself to meet more Sentries and Archers as you go up.
Before grappling to the hook shining on your screen, don’t forget to open the Green Chest behind you. When you’re ready, go where the podium is and go to the other side by grappling. Continue going up and watch how the Titans fight their way up to Mount Olympus.
Once you are up where you see a hall ahead of you, Poseidon’s Limbs and Gaia will start fighting in the background resulting it breaking the pathway ahead of you. Thanks to Icarus’ Wings that you got from GoW: Chains of Olympus, you can glide through it. Get the Blue and Green chest and then proceed to the inside of the hall.God of War III Walkthrough: Prologue- Poseidon,