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.
Successfully make 30 different dishes.
Have or adopt a second child.
Complete 150 Commerce Guild commissions.
Achieve the relationship "Happy Child" with your kid.
Throw ten parties.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Getting divorced.
Defeat 30 rare monsters.
Cumulatively picked up 500 feces.
Have or adopt a child.
Throw a party.
Get 300 items by kicking trees.
Achieve the best relationship with your spouse.
Expand the land area of the workshop to the maximum.
Clear Level 100 of the Deepest Ruins.
Unlock all backpack slots.
Complete the main storyline.
Recognize 5 different constellations.
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.
Enter the Deepest Ruins.
Congratulations!
Pass the trials set by Ginger's family.
Propose to Emily in front of the Pumpkin Princess House.
Meet Pa.
Try lasso roping for 50 times.
Defeat the rogue knight and All Source.
Getting caught by the Sky Shark Pirates.
Find more than 10 Ghost Badges in a single Day of Memories event.
Accept the proposal from Mint.
Accept Gust's proposal.
Completed 100 Inspections at the Commerce Guild.
Win at Cross Five 50 times.
Encounter the rogue knight.
Have maximum HP reach 2000.
Gather 50 assembly diagrams.
Complete the new Portia Harbor.
Complete Phyllis's Dream
Place first in five fishing competitions.
Workshop reputation reaches Level S.
Have maximum Stamina reach 600.
You were at fault...
Be ranked number one in a seasonal workshop ranking.
Complete the adventure in the cave with Arlo.
Recover 15 different types of relics.
Keep the spiciness of the hotpot above 85 for 10 seconds during the Winter Solstice festival.
Defeated all the people that can spar in Portia.
Enjoy some fireworks with Dr. Xu.
Complete South Block.
Provide 100 Data Discs to the Church of the Light.
You missed a date.
Play the seesaw and get your playmate to catch a bird.
Use 50 Fireworks in one setting.
Place 5 advertisements in the Portia Times for the workshop.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Accumulatively give out 500 gifts.
Provide 100 Data Discs to the Research Center.
Accumulated 10 meals during dates and play dates.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Find a diamond.
Help build the Portia Bridge.
Give out a gift that the other person doesn't like.
Opening Of The Museum
Adopt Scraps.
Win the highest possible award in the Slots mini-game.
Gain 150 points in the Dart game.
Everyone likes you!
Forced to sleep at 3:00 in the morning.
Fail at cooking 1 time.
Help fix Ack the living AI.
Did I just use the Blender to mix feces...?
Finish with a over 90% accuracy rate in the Balloons mini-game.
Help the Portia Tree Farm be operational again.
Adopt Pinky.
Clear all the levels in any Hazardous Ruins.
Open 50 treasure chests.
Accumulatively give out 50 gifts that people like.
Talk with other town folks over 500 times.
Complete all five Dee-dee transport commissions.
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.
Discover a mysterious room in Abandoned Ruins.
Enter the Abandoned Ruins for the first time.
Register your workshop.
Arrive at Portia.