Here is the full list of all 48 Kraken Academy!! achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Save Kraken Academy from doom and destruction.
Complete all side quests.
Befriend Nikolai.
Free the Drama Club spirit.
Collect all furniture.
Befriend Kostadin.
Befriend the Janitor.
Befriend Patitsa.
Dig up all piles of dirt in one time loop.
Befriend Pierre.
Befriend the Hobo Guy.
Befriend Jean.
Collect all club cards.
Collect 75,000 shlotinki.
Travel back to Monday 5 times.
Free the Sports Club spirit.
Pull all the levers in the boss's office.
Get the drama club uniform.
Call your Mom 8 times.
Smash 1000 things.
Witness the end of the world.
Befriend Dimitri.
Go on all the dates.
Befriend Vladimir.
Beat Yuki and Wendy's challenges on hard.
Get a score of 20 or more in Dimitri's challenge.
Summon a poop demon.
Score a goal in the gym.
Collect 175 bottles in one go.
Free the Art Club spirit.
Befriend Broccoli Girl.
Convert 3 bottlemachines to the cause in one time loop.
Put furniture into every slot in your room.
Get the cultist robes.
Befriend Ana.
Collect 10,000 shlotinki.
Befriend Ms. Markova.
Smash 250 things.
Free the Music Club spirit.
Wash your hands in 4 different sinks.
Get the skeleboner costume.
Bounce on a bouncy castle.
Pet a cat.
Befriend Simona.
Befriend the Cafeteria Lord.
Get the penguin costume.
Gain the power to travel back in time.
Collect 75 bottles in one go.