Rogue Galaxy

Once you have completed Chapter Four of Rogue Galaxy, you will unlock this trophy.

Chapter Four - The Great Escape

Objectives to complete this chapter:

1. Enter the Galaxy Corporation and speak to MIO.
2. Speak to the cloaked man in the corner of the prison cell.
3. Find and obtain the Prison Barrier Key from a treasure chest.
4. Use the Prison Barrier Key at the Thinking Circle.
5. Find and obtain the Prison EV Startup Chip from a treasure chest.
6. Use the Prison EV Startup Chip at the Thinking Circle.
7. Boss Fight: Rosencaster
8. Go to the festival at Zerard’s Main Street.

Boss Fight Strategy: Rosencaster
 

Your party will consist of Jaster, Lilika and Simon for this battle. Rosencaster hits like a truck, and has powerful combos as well as a dash attack where he rams right into a character for heavy damage. It is important to not attack Rosencaster head on, and instead try to get in some hits from behind him so that he does not hit you. For increased damage, activate Lilika’s Warrior God’s Cry and Jaster’s Illusion Sword. Only attack Rosencaster when you see an opening, and use Jaster’s gun from a distance if you want to be extra safe.

After Rosencaster has taken enough damage, he will spawn a shield around himself that nullifies all damage done to him, but he will continue to battle the same as he did in the first part. Continue attacking Rosencaster’s shield and it will eventually break, allowing you to continue damaging him as normal. If you get caught in one of his combos, use a Heal Potion to restore any lost HP and Resurrections to revive any fallen ally.