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.
Propose to Emily in front of the Pumpkin Princess House.
Pass the trials set by Ginger's family.
Complete 150 Commerce Guild commissions.
Find more than 10 Ghost Badges in a single Day of Memories event.
Throw ten parties.
Complete Phyllis's Dream
Accept Gust's proposal.
Place first in five fishing competitions.
Enjoy some fireworks with Dr. Xu.
You were at fault...
Complete the adventure in the cave with Arlo.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Recognize 5 different constellations.
Have or adopt a second child.
Achieve the relationship "Happy Child" with your kid.
Throw a party.
Defeat 30 rare monsters.
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.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Win the highest possible award in the Slots mini-game.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Accumulatively give out 500 gifts.
Try lasso roping for 50 times.
Successfully make 30 different dishes.
Win at Cross Five 50 times.
Have or adopt a child.
Play the seesaw and get your playmate to catch a bird.
Cumulatively picked up 500 feces.
Accumulated 10 meals during dates and play dates.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Have maximum Stamina reach 600.
Getting divorced.
Use 50 Fireworks in one setting.
Defeated all the people that can spar in Portia.
Complete the main storyline.
Clear Level 10 of the Deepest Ruins.
Meet Pa.
Have maximum HP reach 2000.
Everyone likes you!
Enter the Deepest Ruins.
Unlock all backpack slots.
Expand the land area of the workshop to the maximum.
Defeat the rogue knight and All Source.
Getting caught by the Sky Shark Pirates.
Achieve the best relationship with your spouse.
Congratulations!
Accept the proposal from Mint.
You missed a date.
Workshop reputation reaches Level S.
Completed 100 Inspections at the Commerce Guild.
Encounter the rogue knight.
Gather 50 assembly diagrams.
Place 5 advertisements in the Portia Times for the workshop.
Complete the new Portia Harbor.
Get 300 items by kicking trees.
Recover 15 different types of relics.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Provide 100 Data Discs to the Church of the Light.
Adopt Scraps.
Be ranked number one in a seasonal workshop ranking.
Accumulatively give out 50 gifts that people like.
Keep the spiciness of the hotpot above 85 for 10 seconds during the Winter Solstice festival.
Complete South Block.
Talk with other town folks over 500 times.
Adopt Pinky.
Fail at cooking 1 time.
Opening Of The Museum
Help build the Portia Bridge.
Did I just use the Blender to mix feces...?
Gain 150 points in the Dart game.
Clear all the levels in any Hazardous Ruins.
Help the Portia Tree Farm be operational again.
Provide 100 Data Discs to the Research Center.
Help fix Ack the living AI.
Forced to sleep at 3:00 in the morning.
Open 50 treasure chests.
Give out a gift that the other person doesn't like.
Find a diamond.
Accumulate 10,000 Gols.
Cut down 200 trees.
Pass the test to enter the Collapsed Wasteland.
The first photo taken with someone else.
Pick up 7 gifts during the Day of the Bright Sun event.
Discover a mysterious room in Abandoned Ruins.
Enter the Abandoned Ruins for the first time.
Register your workshop.
Arrive at Portia.