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