Here is the full list of all 84 OMORI achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Unlock all achievements. Thank you for playing OMORI.
Beat the BOSS RUSH.
Defeat ROBOHEART.
Defeat MUTANTHEART.
Defeat PERFECTHEART.
Defeat SPACE EX-HUSBAND.
Defeat PLUTO and THE EARTH.
Complete the FOE FACTS! journal.
Recover at all of MARI's picnics.
Look through all telescopes.
Visit all mirrors.
Let the plastic fish finish its song.
Take the KEEPER OF THE CASTLE's power.
Defeat every SOMETHING at the bottom of the LOST LIBRARY.
Commission all of GATOR GUY's statues.
Get the FLOWER CROWN from BASIL.
Complete your TO-DO LIST.
Read all the tombstones in the... dev room...
Complete the grammar worksheet correctly.
Receive all FLOWERS in the hospital.
Insert every song into GINO'S JUKEBOX.
Feed the STRAY CAT every day and sunset.
High-five KEL three times.
Brush your teeth every day.
Pet all the creatures in MARINA's sector in HUMPHREY.
Defeat the CHICKEN? at the top of DINO'S DIG.
Battle the "bees".
Defeat the HOOLIGANS with PEPPER SPRAY.
Perfectly train the SPROUT MOLE choir.
Turn the valve to the right in RAIN TOWN.
Lose to KIM and VANCE.
Complete the math worksheet correctly.
Defeat ???.
Enter code: haveadollariguess at www.omocat-shop.com for $1.00 off.
Reach the good ending.
Reach the bad ending.
Reach the other ending.
Go to SEAN and KAREN's housewarming party.
Defeat the RECYCLEPATH.
Defeat the PET ROCK champion.
Give FLOWERS to MARI.
Take $20.00 from KEL's wardrobe.
Complete all part-time jobs once.
Get a perfect score delivering PIZZA.
Quit in the middle of a part-time job.
Get all rewards from the RECYCLING MACHINE.
Trade CLAMS for CLEMS.
Defeat 100 BUNNIES.
Pet a dog.
Listen to MR. SCARETHROW's rant.
Get the LOL SWORD.
Watch all movies in SWEETHEART'S "throne room".
Commission all of ROCOCO's art.
Have a ghost party.
Commission ROCOCO.
Hold 99 TOFU.
Defeat 100 SQUIZZARDS.
Defeat UNBREAD TWINS.
Gain BREAD using BREAD SLICE.
Throw away something.
Complete ORANGE JOE's quest.
Defeat KITE KID.
Defeat HUMPHREY.
Defeat SLIME GIRLS.
RELEASE ENERGY on your foes.
Defeat PLUTO (EXPANDED).
Defeat MR. JAWSUM.
Don't high-five KEL.
Defeat SWEETHEART.
Kill the first SOUS CHEF.
Ruin Christmas.
Choose the WINTER MOLE.
Choose the FALL MOLE.
Choose the SUMMER MOLE.
Choose the SPRING MOLE.
Make your way and talk to LONE MOLE.
Go to sleep after a long day.
High-five KEL.
Wake up in the morning.
Defeat SPACE EX-BOYFRIEND.
Defeat DOWNLOAD WINDOW.
Defeat THE EARTH.
Fly the BUTT CERTIFICATE in CATTAIL FIELD.
Water a plant back to life in BASIL's garden.