With all of the prisms, go to the Dojo Master and he will advance Ash to the Vandalier. Now you can see the true ending.
With all five keys talk to the weird man in Glasgow City. He will give you the Heaven Key.
After saving Leena in the Tsukue Plains, return to Frontier Village. Talk to the Old Man in the Tavern. You will learn that there is something in the center of the Lava Pond. Go to Smoking Bones Cave, and search the center near the Salamander with a flying character. That is where the Logos Key is located.
To get the Chaos Key, you will need three items: the Macroman, Tarot Card, and the Rayman. The Macroman is found in the Northwest corner of Ygdra Canaon. The Tatrot Card is found at Basil Gate in the southeast corner there is an X made from the grass. The Ramen is in the grate on the front car on the Magical Train. Go to Kerachi Village, go to the Tavern, and talk to the collector.
At the Prison Fortress, examine the floor near the gate. You will see a small crater, that is where the Mana Key is located.
Talk to the Young Man in the Tavern, he'll tell you he droped a weird fruit in a plus sign bog. Pick it up and give it to him. You will get the Earth Key.
After killing Death Ant in the Dunes, talk to the Woman at the Tavern, she will give you the Nova Key.
In the battle of the castle ruins in Chapter 2 (after the ambush at the swamp). There will be two healing circles and two elevators. Stock everyone up with Mage Oils before going into battle. When you enter the level kill all the monsters, but DO NOT go near the temple. Instead, have Sara stand on one of the healing circles and begin casting "Mystic Shield" on herself repeatedly. It takes about six casts to raise one level. Then do the same with Huxley. It takes a lot of time but its worth it. (I got them up to level 20 and had the Dojo make them into a Ninja, and they were my best people.)
If you were looking for Vandal Hearts for PSX cheats, then you might also want cheats for: