Here is the full list of all 51 STAR OCEAN THE SECOND STORY R achievements.
Proof of one who has completely mastered the ocean of stars.
Proof of freeing the entire Voice Collection.
Proof of seeing more than 15 endings.
An honor bestowed upon those who complete the game as Rena.
Proof of recruiting Chisato. "Well, duh! I've got to find out how your story ends."
Proof of recruiting Dias. "I'm strong because I wanted to protect myself."
Proof of seeing the Armory Contest through to the end.
Proof of starting the adventure as Rena.
Proof of recruiting Noel. "Survival is a battle, and only the strong survive. Isn't that how it works?"
Proof of doing battle with an advantage due to the Super Specialty "Bodyguard."
Proof of recruiting Bowman. "Every expedition needs an experienced, knowledgeable scientist in the party, doesn't it?"
Proof of an ultra elite chef who bested Yarma, the God of Food, in Cooking Master.
Proof of having 5 correct predictions at the Bunny Races.
An honor bestowed upon a stalwart soul who emerged triumphant in the Ten Wise Men Return.
Ultimate proof of learning the truth and besting the ultimate destroyer.
Proof of reaching max level in all 28 IC skills, specialties, and super specialties.
Proof of defeating the crazed celestial being summoned by the Devil's Aria.
Proof of victory over the being who awaits in the depths of the Maze of Tribulations.
An honor bestowed upon those who complete the game as Claude.
Proof of a final night spent in L'Aqua.
Proof of defeating one of the Ten Wise Men for the first time.
Proof of learning Rena's past in a certain laboratory.
Proof of soaring with the Psynard.
Proof of miraculously reaching Energy Nede despite the perilous circumstances.
Proof of defeating the commander of the monster army.
Proof of recruiting Leon. "This is nothing for someone like me. I am a genius, after all."
Proof of assembling a full party of 8 characters.
Proof of recruiting Ernest. "I'm an archaeologist...and if you lived in the States, chances are you've heard of me before."
Proof of finding the precious mineral in the Hoffman Ruins.
Proof of completing 100 challenge missions.
Proof of using assault actions 20 times with set party members.
Proof of recruiting Precis. "It's just kinda like, la la la!"
Proof of deepening friendship through lots of personal interactions with party members.
Proof of recruiting Welch. "C'mon, we're gonna whip you into shape!"
Proof of recruiting Opera. "I already have somebody in my life."
Proof of crossing blades with mighty opponents at the Armory Contest.
Proof of walking more than 40,000 steps.
Proof of recruiting Ashton. "I said, 'You have to take responsibility for this!'"
Proof of rescuing the town of symbologists from their plight.
Upset bunnies 10 times.
Proof of a first-class fisherman who has caught many kinds of fish and obtained the Masterwork Rod.
Proof of successfully pickpocketing 20 times.
Proof of learning a super specialty.
Enter Rage 10 times due to fallen party members.
Proof of walking more than 8,000 steps.
Proof of discovering a unique spot for the first time.
Proof of solving the incident in Salva Mines.
Proof of recruiting Celine. "If you want to pick a fight, you had best choose your opponents more carefully..."
Proof of starting the adventure as Claude.
Create an item with an IC skill.
Proof of improving a battle skill, IC, or specialty skill for the first time.