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