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