Item description:

All Missable Mystic Arts have been collected off all bosses and optional bosses and you just need to pull off the party members Mystic Arts in order to get the achievement
Item Collector has items left to collect on it it's like 7/8ths done
Break Souls are incomplete you need to perform everyone's break soul to get the achivement
Enemy Data Collector has been completed but it might give you the achievement if you get one of the unlisted enemies. I didn't get any enemy data from the Throne of the Empyrion so try there to get new enemies listed
Optional Dungeons have all been finished so you'll need to restart if you wanna do those
Not all character titles are at level 2 but most are halfway done to level 2
a few characters have 50 skills maxed but not everyone in the party has 50 skills maxed. It still might give you the achievement if you max another skill for the characters who are at 50
All Katz chests are found so you'll need to restart to get it.
All Islands have been completed, but if you fight an island enemy wave again it might give it to you.
Tales coins have been completed, try earning more to see if it will grant you the achievement.