Here is the full list of all 46 SaGa Frontier Remastered achievements.
Defeated the masked fiend in Dev 2.
Transformed into a monster and became Mariche.
Be possessed by Living Sword or Living Musket.
Transformed into a monster and became a black dragon.
Switched to all mech chassis types.
Purchased all types of items sold at shops.
Had all recruitable characters join your party.
Had Thunder, Suzaku, Slime, Kylin, Red Turnip, Sei, Riki, and Cotton join your party.
Had Leonard, ZEKE, BJ&K, Engineer Car, pzkwN, T260, and Rabbit join your party.
Completed the story lines of all eight protagonists.
Viewed Fuse's ending.
Had Ren, Doll, Rabbit, Silence, and Cotton join your party.
Had Zozma, White Rose, Ildon, Rei, Mesarthim, Time Lord, Nusakan, and Silence join your party.
Had Red, Blue, Emilia, Riki, T260, Asellus, Lute, and Fuse join your party.
Viewed T260G's ending.
Visited all regions.
Viewed Riki's ending.
Defeated Virgil in two turns or fewer.
Transformed into a monster and became a Dullahan.
Viewed Emilia's ending.
Defeated Abyssbat.
Had Roufas, Annie, and Liza join your party.
Viewed Asellus's ending.
Viewed Blue or Rouge's ending.
Mastered a spell for the first time.
Received the gift of Arcane Magic.
Received the gift of Shadow Magic.
Viewed Red's ending.
Viewed Lute's ending.
Performed a five-technique combo for the first time.
Used spells 100 times.
Purchased all items that can be purchased in exchange for LP.
Had at least 100,000 credits.
Sold gold for a certain amount of credits or more.
Received the gift of Rune Magic.
Received the gift of Light Magic.
Mastered a technique for the first time.
Had Fei-on and Mei-ling join your party.
Swallowed by Tanzer for the first time.
Had Rouge join your party.
Used techniques 100 times.
Had Capt. Hamilton join your party.
Glimmered a technique for the first time.
Transformed into a monster for the first time.
Infused a monster into a piece of equipment for the first time.
Defeated the ultimate version of the boss battle chain.