you heve to have Hercules break the pad lock off the gate
use your house key. if it doesn't work; try and try again.
you get hurcules to open it but first you need to get the five sacred items and go to Athena
Mythology IslandHercules will smash the lock on the Olympus Gate after you have been to the throne rooms of Hades and Poseidon.Zomberry IslandThere are bolt cutters in Joe Puddy's apartment in the Shady Side building.
You cannot open the lock to enter Olympus. After you have found the 5 sacred items and they are taken by Zeus, Hercules will help you reach the throne rooms of Poseidon and Hades, and then smash open the lock so you can confront Zeus on Mount Olympus.
After Zeus takes the 5 sacred items, you can get Hercules to help you reach the throne rooms of Hades and Poseidon. Once you have the crown and the trident, you can go to battle Zeus on Mount Olympus. Transport Hercules to the gate and he will smash open the padlock. (*before going to Olympus, you will need the drachma coin from cleaning Hades' temple)
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You teleport by the mirror.
There is no key. After Zeus has the 5 sacred items, Hercules will help you go to see Poseidon and Hades, and then he will smash open the padlock on the gate.
When you have returned the 5 sacred items, Zeus steals them. Hercules will help you reach the throne rooms of Poseidon and Hades, and can open the lock on the Mount Olympus gate.
She is on the path to Mount Olympus. She turns Hercules into stone when you first arrive there, so there is nothing you can do about her. To open the Olympus gate, recover the 5 sacred items and return them to the Tree of Immortality. Once you decipher the message, you will have to get Hercules to help you, using the Mirror of Aphrodite. Once you have the Trident from Poseidon and the Crown from Hades, Hercules will smash open the lock on the gate. (see related question)
use your house key. if it doesn't work; try and try again.