The achievement for this game is really easy to obtain because most of them can easily unlock after you completed the game. One of the hardest is probably completing your bestiary. I have a list of monsters and their location with maps here for your reference.
| Achievement | How to achieve |
|---|---|
| A Hero's Journey | Saved Princess Sarah by defeating Garland. |
| Apprentice Warrior | Defeated 100 monsters. |
| Field Research - Basic | Completed 10% of the Bestiary entries. |
| Thrifty Spender | Obtained 10,000 gil. |
| Experienced Warrior | Defeated 300 monsters. |
| Legendary Warrior | Defeated 500 monsters. |
| Rookie Treasure Hunter | Collected treasure from 10% of the chests. |
| Smart Saver | Obtained 50,000 gil. |
| Moneybags | Obtained 100,000 gil. |
| Earth's Blessing | Restored the Earth Crystal's light. |
| Rekindled Flame | Restored the Fire Crystal's light. |
| Field Research - Advanced | Completed 50% of the Bestiary entries. |
| Veteran Treasure Hunter | Collected treasure from 50% of the chests. |
| Token of Courage | Gained titles of courage from Bahamut. |
| Revitalizing Waters | Restored the Water Crystal's light. |
| Adventurous Wayfarer | Traveled to all the map locations. |
| Wind's Caress | Restored the Wind Crystal's light. |
| Sword of Myth | Obtained Excalibur. |
| Prophecy Foretold | Defeated Chaos and restored peace to the world. |
| Seasoned Hero | Reached level 50 for all party members. |
| Hidden Game | Played the 15 Puzzle game. |
| Legendary Treasure Hunter | Collected treasure from 100% of the chests. |
| Field Research - Professional | Completed 100% of the Bestiary entries. |
| Master of I | Earned all achievements. |