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