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