Star Ocean: Till The End Of Time

From the main plaza in Gemity, head to the Northern transporter to participate in the Fighting Arena. In Single Battles, you will be tasked with choosing one character to take on five enemies in consecutive battles; the difficulty of these enemies will vary depending on the rank you choose. There are a total of five ranks to choose from and you must defeat all of the ranks in order to unlock this trophy. Below are the five ranks and their rewards:

• D Rank - Entry Fee: 100 Fol (Reward: Magical Berries)
• C Rank - Entry Fee: 300 Fol (Reward: Mallet Charm)
• B Rank - Entry Fee: 500 Fol (Reward: Bunny Shoes)
• A Rank - Entry Fee: 1000 Fol (Reward: Star Guard)
• S Rank - Entry Fee: 2000 Fol (Reward: Imposing Scroll)

During your first time in Gemity, you may get up to B Rank before the enemies start catching up with you in terms of difficulty, which is why it's better to come back near the end game before you fight the final boss. You'll be set to beat all of the opponents if you're somewhere in the Level 70 - 80 range. Because you'll be alone, you'll want to make sure you have items that prevent status effects like paralyze and petrifaction. You should also come stocked with items, the Physical and Mental enhancers purchasable from the shop in Gemity are must haves. Don't forget to take advantage of Cancel Bonuses to deal good damage to your opponents. Once you beat all of the classes in Single Battles with one character, the trophy will unlock.