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