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