Unlockable Dungeons: After you have revealed Dhaos' Castle in the future, two new dungeons will be unlocked.
Dwarven Ruins: In the Treasure Room of the 21st level of Morlia, there is a blue button that you can press to reveal a warp for a new dungeon. Dungeon has 9 floors.
Morlia Mineshaft (Lower Levels): After you have revealed Dhaos' Castle, head to 9th floor of the Morlia Mineshaft, now there will a new opening for 12 new floors (21 in all).
Ishitori Sequence: Whenever you play Ishitori with the Ishitori Master in Alvanista Castle, go first. Then Always bring down the amount of stones to whatever number is closest in this sequence 1-5-9-13-17-21-25-29-33-37-41-45-49-53-57...etc. You will win every time.
Optional Summons: There are several summons that can be obtained without going through the game, but doing certain other sidequests in the future after you have obtained the Tech Birds.
Chameleon: Get the Emerald Pact Ring from Gnome's Cave in the future and then make it to the 16th floor of Morlia Mineshaft, he is in a room filled with gas.
Gremlin: Get the Sapphire Ring from Undine's Cave and reach the 21st level of Morlia. He is in a room located in the south with gas.
Pluto: Go to the Dwarven Ruins, obtain the Lapiz Ring there, and make it to the 9th floor to have a boss battle with Pluto/Brute.
The spirt of Darkness, Shadow: Go to Lone(Sylph) Valley and get the pact ring from the catacombs, then go to the cave of darkness to the southeast of Arlee.
The spirt of Light, Aska: Go to Alvanista and talk to the lady standing at south entrence, then go back to the time machine in Thor and ask for Aska to be released.
Unlockables: Battle Lv.3 (Maniac) Difficulty - Beat the game once. Mini-Game - Let's Go Arche - complete the game once New Game+ Mode - complete the game once Pink Options in Title Screen - complete the game once New Songs in Sound Mode - complete the game once (Japanese version only)
