If you can get a Thief's Glove before Kurik is destroyed, you can get the item "Mischief" in a private action. Go to Harly, and buy the glove (do not forget the skills "Poker Face" and "Courage"). Go to Kurik. By doing a Private Action and going to the town square, you will see a woman warning everyone about the town's oncoming destruction, but no one will pay heed. Once she is done talking, go up to her and pick pocket her to get the Mischief accessory. With this item, every step you take gives you a chance for items, Fol, and other things.
Use the save point right before fighting Gabriel. Once the saved game icon turns blue, return to the arena in Fun City and talk to the old man in the audience in the north side of the arena. Accept his offer to recover your memories. You will return to Arlia on Expel. Leave Arlia, and you will have your Psynard. You can now find the hidden Maze Of Tribulations dungeon at the lone dot on the desert island located southwest on the world map.
Just as in Star Ocean: First Departure, you can obtain one of the toughest swords very early in the game by getting a decent level in Pick Pocketing (approximately level 6 to 8) and a Thief's Glove at Harly. Go to Mars Villag, and pick pocket the old man by the inn to get the Goodie Box. Then, go outside and save the game. Open the box and you will get three items. If the Sword of Marvels is not in it, try again by reloading your saved game. Eventually you will get this great sword and may not need to switch again until much later in the game.
Have the Private Action in Kurik occur where Philia warns the citizens to evacuate the city. Then, go to the final save point in Phynal. Leave Phynal and have the Private Action in Centropolis occur. Talk to Philia in the lobby of the main building to remove Gabriel's limiter, allowing him to become more powerful.