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