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