Here is the full list of all 91 My Time At Portia achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Complete the adventure in the cave with Arlo.
Accept Gust's proposal.
Accept the proposal from Mint.
Complete Phyllis's Dream
Pass the trials set by Ginger's family.
Have or adopt a second child.
Achieve the relationship "Happy Child" with your kid.
Complete 150 Commerce Guild commissions.
Have or adopt a child.
Achieve the best relationship with your spouse.
Getting divorced.
Congratulations!
Propose to Emily in front of the Pumpkin Princess House.
Throw ten parties.
Successfully make 30 different dishes.
Recognize 5 different constellations.
Place first in five fishing competitions.
Be ranked number one in a seasonal workshop ranking.
Completed 100 Inspections at the Commerce Guild.
Throw a party.
Complete the main storyline.
Keep the spiciness of the hotpot above 85 for 10 seconds during the Winter Solstice festival.
Meet Pa.
Clear Level 100 of the Deepest Ruins.
Used all items from the Vending Machine in the Deepest Ruins.
Get to Level 50 of the Deepest Ruins without using Vending Machines.
Clear Level 50 of the Deepest Ruins.
Clear Level 10 of the Deepest Ruins.
Enter the Deepest Ruins.
Cumulatively picked up 500 feces.
Defeat the rogue knight and All Source.
Getting caught by the Sky Shark Pirates.
Workshop reputation reaches Level S.
Enjoy some fireworks with Dr. Xu.
Gather 50 assembly diagrams.
Complete the new Portia Harbor.
Encounter the rogue knight.
Defeat 30 rare monsters.
Place 5 advertisements in the Portia Times for the workshop.
You were at fault...
Adopt Scraps.
Get 300 items by kicking trees.
Accumulated 10 meals during dates and play dates.
Have maximum Stamina reach 600.
Try lasso roping for 50 times.
Have maximum HP reach 2000.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Complete South Block.
Recover 15 different types of relics.
Find more than 10 Ghost Badges in a single Day of Memories event.
Accumulatively give out 500 gifts.
Use 50 Fireworks in one setting.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Defeated all the people that can spar in Portia.
Everyone likes you!
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Find a diamond.
Opening Of The Museum
Cut down 200 trees.
Help build the Portia Bridge.
Fail at cooking 1 time.
Play the seesaw and get your playmate to catch a bird.
Clear all the levels in any Hazardous Ruins.
Open 50 treasure chests.
Talk with other town folks over 500 times.
Did I just use the Blender to mix feces...?
Provide 100 Data Discs to the Church of the Light.
Accumulatively give out 50 gifts that people like.
Win the highest possible award in the Slots mini-game.
Gain 150 points in the Dart game.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Provide 100 Data Discs to the Research Center.
Give out a gift that the other person doesn't like.
You missed a date.
Help fix Ack the living AI.
Help the Portia Tree Farm be operational again.
Pass the test to enter the Collapsed Wasteland.
Complete all five Dee-dee transport commissions.
The first photo taken with someone else.
Pick up 7 gifts during the Day of the Bright Sun event.
Adopt Pinky.
Discover a mysterious room in Abandoned Ruins.
Accumulate 10,000 Gols.
Win at Cross Five 50 times.
Expand the land area of the workshop to the maximum.
Unlock all backpack slots.
Enter the Abandoned Ruins for the first time.
Forced to sleep at 3:00 in the morning.
Register your workshop.
Arrive at Portia.