Full list of all 41 Monster Sanctuary (Windows) achievements worth 1,200 gamerscore.
The base game contains 34 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 7 achievements worth 200 Gamerscore.
Receive a 5 star score in the Champion Challenge
Beat all of Trainer Gotthelm's challenges
Explore the forbidden catacombs
Enter the Land of Blobs
Uncover the source of Marduk's powers
Prove a worthy opponent
Recover long lost treasure
Win 200 wild enounters
Defeat the Goblin King
Achieve at least a 25 x Combo
Evolve a monster
Confront the Alchemists in the Library
Become A Keeper Lancer
Obtain a shifted monster
Restore balance to the Sun Palace
Receive a Tanuki Egg
Receive a reward from the Monster Army
Pass the Oracle's test
Defeat all monsters in a single turn
Five-star a battle
Calm the Blue Caves
Discover a hidden room entrance
Help out a resident of the Sanctuary
Complete Old Buran's training
Hatch first monster
Defeat Marduk
Obtain all monsters
Deal over 10,000 damage in a single hit
Receive 5 star scores against all Champions
Uncover the whole map
Upgrade 50 pieces of gear
Complete twenty five battles in the Infinity Arena OR PvP
Donate 100 Monsters to the Monster Army
Become a Keeper Master
Tread where no Keeper has gone before
Free the Wanderer from their icy prison
Restore the World Tree and learn about the true form of your Spectral Familiar
Fully equip a Bard with instruments
Reach max level with a Monster
Unlock all alternative outfits
Defeat all Legendary Keeper Battles