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