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