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