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