Full list of all 41 Monster Sanctuary achievements.
The base game contains 34 achievements, and there is 1 DLC pack containing 7 achievements.
Discover a hidden room entrance
Help out a resident of the Sanctuary
Complete Old Buran's training
Five-star a battle
Hatch first monster
Confront the Alchemists in the Library
Defeat the Goblin King
Pass the Oracle's test
Restore balance to the Sun Palace
Recover long lost treasure
Prove a worthy opponent
Complete Forgotten Workshop story content
Complete Underworld story content
Enter the Land of Blobs
Defeat Marduk
Receive a Tanuki Egg
Become A Keeper Lancer
Defeat all monsters in a single turn
Obtain a shifted monster
Evolve a monster
Receive a 5 star score in the Champion Challenge
Upgrade 50 pieces of gear
Complete twenty five battles in the Infinity Arena OR PvP
Receive a reward from the Monster Army
Deal over 10,000 damage in a single hit
Win 200 wild enounters
Beat all of Trainer Gotthelm's challenges
Achieve at least a 25 x Combo
Become a Keeper Master
Donate 100 Monsters to the Monster Army
Uncover the whole map
Obtain all monsters
Receive 5 star scores against all Champions
Calm the Blue Caves