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