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