Once Hercules helps you, use Aphrodite's mirror to go to Posidon's realm. Hercules will smash the rocks guarding Posidon's realm.
you get Hercules to come with you.
Hades often aided Hercules in Greek mythology; allowing Hercules to take Cerberus, and to take two people from the realm and up to earth.
hercules will help u to push the big rock that blocking the door to hades realm,u can just convice hercules when you complete the things that u nid to bring to zeus!!
Hercules brought Cerberus out of the Underworld, the realm of Hades.
Hercules or Heracles was an ancient Greek hero. He lived in Thebes.
Once Zeus has taken the five sacred items, Hercules will agree to help you. You will need the mirror from Aphrodite in the realm of Poseidon. Hercules doesn't like to walk far. In Poseidon's realm, Hercules will kick away the large rock so you can reach Poseidon's throne. When you have the Trident, go with Hercules to the realm of Hades, where he will move the huge boulder. Once you have the Hades Crown, transport back to the Olympus gate and Hercules will smash open the lock. (see related question)
Hercules will help you reach the throne rooms of Poseidon and Hades. But you need the Touchscreen Mirror from Aphrodite's test in Poseidon's realm.
Hades and Hercules had a complicated relationship; but Hades seemed to favor Hercules, for he allowed the taking of Perseus and Cerberus from his realm by Hades.
On the far right of Hades' realm is Poseidon's realm. Place the starfish on the tray (if you have it) and he's in the realm. But you must later on in the game have Hercules break the rock blocking his thrown underwater. Their you would find Poseidon's.
you need Hercules to break a rock under the water near the sea monster thing
Get the starfish. Go to Posideon's temple and place the starfish there. Enter his realm. You start by getting the mirror from Aphrodite. Go down and beat the hydra. Then go to the rock. Teleport back to Zeus realm using the mirror and convince hercules. Go back to Posideon's realm and then Hercules will break the rock. Talk to Posideon. Go back up and get the other 4 things if you haven't already. Then clean hades's temple and get the drachma. Enter and go down to the river. Jump and duck until you get to hades. Now you can teleport up and hercules will break the lock.