Star Ocean Cheats

After beating the final boss of the game, use the oracle skill, and go through the south-west door.
You'll end up in the Tataroy arena. Now go one step up, to arrive in the Seven Star Ruin. This secret dungeon has 30 levels and no save points.
It contains super hard enemies, and a even harder boss.
At the bottom is some of the best items in the game.

After you have beaten the game, reload your saved game and have somebody use the Oracle specialtiy. You will be sent to a secret area. Each door takes you to a room where you can talk to members of the game's development staff. To exit, take the passage on the lower left or right corner. The lower right corner will take you to the Revorse Tower. The lower left corner will take you to Tatoroy.