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.
Propose to Emily in front of the Pumpkin Princess House.
Throw ten parties.
Enjoy some fireworks with Dr. Xu.
Complete the adventure in the cave with Arlo.
Complete the main storyline.
Clear Level 100 of the Deepest Ruins.
Throw a party.
Meet Pa.
Get to Level 50 of the Deepest Ruins without using Vending Machines.
Used all items from the Vending Machine in the Deepest Ruins.
Clear Level 50 of the Deepest Ruins.
Clear Level 10 of the Deepest Ruins.
Enter the Deepest Ruins.
Getting caught by the Sky Shark Pirates.
Defeat the rogue knight and All Source.
Encounter the rogue knight.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Adopt Scraps.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Use 50 Fireworks in one setting.
Find more than 10 Ghost Badges in a single Day of Memories event.
Gather 50 assembly diagrams.
Place first in five fishing competitions.
Place 5 advertisements in the Portia Times for the workshop.
Recognize 5 different constellations.
Accept the proposal from Mint.
Pass the trials set by Ginger's family.
Win at Cross Five 50 times.
Complete all five Dee-dee transport commissions.
Complete 150 Commerce Guild commissions.
Getting divorced.
Accept Gust's proposal.
Everyone likes you!
Expand the land area of the workshop to the maximum.
Defeated all the people that can spar in Portia.
Recover 15 different types of relics.
Complete the new Portia Harbor.
You were at fault...
Congratulations!
Complete Phyllis's Dream
Have maximum HP reach 2000.
Have maximum Stamina reach 600.
Accumulatively give out 500 gifts.
Cumulatively picked up 500 feces.
Defeat 30 rare monsters.
Successfully make 30 different dishes.
Workshop reputation reaches Level S.
Accumulated 10 meals during dates and play dates.
Complete South Block.
Play the seesaw and get your playmate to catch a bird.
Keep the spiciness of the hotpot above 85 for 10 seconds during the Winter Solstice festival.
Try lasso roping for 50 times.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Adopt Pinky.
Completed 100 Inspections at the Commerce Guild.
Help build the Portia Bridge.
Unlock all backpack slots.
Provide 100 Data Discs to the Church of the Light.
Give out a gift that the other person doesn't like.
Talk with other town folks over 500 times.
Accumulatively give out 50 gifts that people like.
Opening Of The Museum
Win the highest possible award in the Slots mini-game.
Fail at cooking 1 time.
Provide 100 Data Discs to the Research Center.
Be ranked number one in a seasonal workshop ranking.
Help fix Ack the living AI.
The first photo taken with someone else.
You missed a date.
Help the Portia Tree Farm be operational again.
Clear all the levels in any Hazardous Ruins.
Open 50 treasure chests.
Pass the test to enter the Collapsed Wasteland.
Get 300 items by kicking trees.
Discover a mysterious room in Abandoned Ruins.
Pick up 7 gifts during the Day of the Bright Sun event.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Accumulate 10,000 Gols.
Cut down 200 trees.
Find a diamond.
Gain 150 points in the Dart game.
Forced to sleep at 3:00 in the morning.
Did I just use the Blender to mix feces...?
Enter the Abandoned Ruins for the first time.
Arrive at Portia.
Register your workshop.