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.
Win at Cross Five 50 times.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Defeat 30 rare monsters.
Pass the trials set by Ginger's family.
Find more than 10 Ghost Badges in a single Day of Memories event.
Complete Phyllis's Dream
Accept Gust's proposal.
You were at fault...
Getting divorced.
Propose to Emily in front of the Pumpkin Princess House.
Throw ten parties.
Place first in five fishing competitions.
Recognize 5 different constellations.
Accumulatively give out 500 gifts.
Cumulatively picked up 500 feces.
Enjoy some fireworks with Dr. Xu.
Complete the adventure in the cave with Arlo.
Place 5 advertisements in the Portia Times for the workshop.
Get 300 items by kicking trees.
Have or adopt a second child.
Win the highest possible award in the Slots mini-game.
Successfully make 30 different dishes.
Achieve the relationship "Happy Child" with your kid.
Defeated all the people that can spar in Portia.
Clear Level 100 of the Deepest Ruins.
Used all items from the Vending Machine in the Deepest Ruins.
Accumulatively give out 50 gifts that people like.
Throw a party.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Complete 150 Commerce Guild commissions.
Get to Level 50 of the Deepest Ruins without using Vending Machines.
Expand the land area of the workshop to the maximum.
Clear Level 50 of the Deepest Ruins.
Have maximum Stamina reach 600.
Have maximum HP reach 2000.
Try lasso roping for 50 times.
Complete all five Dee-dee transport commissions.
Play the seesaw and get your playmate to catch a bird.
Use 50 Fireworks in one setting.
Have or adopt a child.
Give out a gift that the other person doesn't like.
Provide 100 Data Discs to the Church of the Light.
Everyone likes you!
Gain 150 points in the Dart game.
Accumulated 10 meals during dates and play dates.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Complete the main storyline.
Meet Pa.
Achieve the best relationship with your spouse.
Clear Level 10 of the Deepest Ruins.
Enter the Deepest Ruins.
You missed a date.
Unlock all backpack slots.
Defeat the rogue knight and All Source.
Getting caught by the Sky Shark Pirates.
Workshop reputation reaches Level S.
Pick up 7 gifts during the Day of the Bright Sun event.
Gather 50 assembly diagrams.
Complete the new Portia Harbor.
Completed 100 Inspections at the Commerce Guild.
Encounter the rogue knight.
Congratulations!
Accept the proposal from Mint.
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.
Did I just use the Blender to mix feces...?
Clear all the levels in any Hazardous Ruins.
Complete South Block.
Cut down 200 trees.
Adopt Pinky.
Adopt Scraps.
Recover 15 different types of relics.
Fail at cooking 1 time.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Help build the Portia Bridge.
Opening Of The Museum
Talk with other town folks over 500 times.
Provide 100 Data Discs to the Research Center.
Help fix Ack the living AI.
Open 50 treasure chests.
Help the Portia Tree Farm be operational again.
Pass the test to enter the Collapsed Wasteland.
Find a diamond.
The first photo taken with someone else.
Discover a mysterious room in Abandoned Ruins.
Accumulate 10,000 Gols.
Forced to sleep at 3:00 in the morning.
Enter the Abandoned Ruins for the first time.
Register your workshop.
Arrive at Portia.