Galaxy Mode is one of the difficulty settings in the Star Ocean series. Galaxy mode provides some challenge but has since become the default challenge.
First Departure was planned to have Galaxy and Universe modes during development, but seeing as how the original Super Famicom version of the game did not have such difficulties, the modes were "dummied out" and are only "accessible" via hacking the game.
To unlock Galaxy Mode, 45% of the Sound Collection must be unlocked.
Unlike in The Second Story, the player must defeat 2000 enemies total (including bosses) in a single save to unlock both Galaxy and Universe modes.
Galaxy Mode is the default difficulty recommended for players who are familiar with the Star Ocean series. This mode is the basis for the other difficulties, and is the first difficulty where Battle Trophies can be unlocked.
Galaxy Mode also reappears for the series fourth installment as the default difficulty.