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