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.
Getting divorced.
Have or adopt a second child.
Complete 150 Commerce Guild commissions.
Achieve the relationship "Happy Child" with your kid.
Have or adopt a child.
Achieve the best relationship with your spouse.
Congratulations!
Propose to Emily in front of the Pumpkin Princess House.
Complete the main storyline.
Pass the trials set by Ginger's family.
Accumulated 10 meals during dates and play dates.
Complete Phyllis's Dream
Throw ten parties.
You were at fault...
Accept the proposal from Mint.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Win the highest possible award in the Slots mini-game.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Recognize 5 different constellations.
Play the seesaw and get your playmate to catch a bird.
Clear Level 100 of the Deepest Ruins.
Cumulatively picked up 500 feces.
Meet Pa.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Win at Cross Five 50 times.
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.
Place 5 advertisements in the Portia Times for the workshop.
Clear Level 10 of the Deepest Ruins.
Enter the Deepest Ruins.
Get 300 items by kicking trees.
Accept Gust's proposal.
Successfully make 30 different dishes.
Defeat the rogue knight and All Source.
Getting caught by the Sky Shark Pirates.
Place first in five fishing competitions.
Recover 15 different types of relics.
Workshop reputation reaches Level S.
Expand the land area of the workshop to the maximum.
Completed 100 Inspections at the Commerce Guild.
Everyone likes you!
Be ranked number one in a seasonal workshop ranking.
Gather 50 assembly diagrams.
Have maximum HP reach 2000.
Have maximum Stamina reach 600.
Keep the spiciness of the hotpot above 85 for 10 seconds during the Winter Solstice festival.
Enjoy some fireworks with Dr. Xu.
Use 50 Fireworks in one setting.
Complete the new Portia Harbor.
Encounter the rogue knight.
Accumulatively give out 500 gifts.
Complete the adventure in the cave with Arlo.
Talk with other town folks over 500 times.
Adopt Scraps.
Defeat 30 rare monsters.
Throw a party.
Complete South Block.
You missed a date.
Provide 100 Data Discs to the Church of the Light.
Unlock all backpack slots.
Accumulatively give out 50 gifts that people like.
Find a diamond.
Defeated all the people that can spar in Portia.
Help build the Portia Bridge.
Adopt Pinky.
Opening Of The Museum
Find more than 10 Ghost Badges in a single Day of Memories event.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Did I just use the Blender to mix feces...?
Clear all the levels in any Hazardous Ruins.
Fail at cooking 1 time.
Help fix Ack the living AI.
Provide 100 Data Discs to the Research Center.
Cut down 200 trees.
Open 50 treasure chests.
Help the Portia Tree Farm be operational again.
Try lasso roping for 50 times.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Complete all five Dee-dee transport commissions.
Give out a gift that the other person doesn't like.
Gain 150 points in the Dart game.
The first photo taken with someone else.
Pick up 7 gifts during the Day of the Bright Sun event.
Pass the test to enter the Collapsed Wasteland.
Discover a mysterious room in Abandoned Ruins.
Accumulate 10,000 Gols.
Forced to sleep at 3:00 in the morning.
Enter the Abandoned Ruins for the first time.
Register your workshop.
Arrive at Portia.