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