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