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 150 Commerce Guild commissions.
Have or adopt a second child.
Achieve the relationship "Happy Child" with your kid.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Win at Cross Five 50 times.
Have or adopt a child.
Throw ten parties.
Achieve the best relationship with your spouse.
Getting divorced.
Accumulatively give out 500 gifts.
Congratulations!
Expand the land area of the workshop to the maximum.
Pass the trials set by Ginger's family.
Clear Level 100 of the Deepest Ruins.
Used all items from the Vending Machine in the Deepest Ruins.
Accept the proposal from Mint.
Successfully make 30 different dishes.
Propose to Emily in front of the Pumpkin Princess House.
Throw a party.
Get to Level 50 of the Deepest Ruins without using Vending Machines.
Complete the adventure in the cave with Arlo.
Clear Level 50 of the Deepest Ruins.
Complete the main storyline.
Clear Level 10 of the Deepest Ruins.
Meet Pa.
Enter the Deepest Ruins.
Have maximum Stamina reach 600.
Everyone likes you!
Find more than 10 Ghost Badges in a single Day of Memories event.
Accept Gust's proposal.
Defeat the rogue knight and All Source.
Getting caught by the Sky Shark Pirates.
Workshop reputation reaches Level S.
Have maximum HP reach 2000.
Recover 15 different types of relics.
Enjoy some fireworks with Dr. Xu.
Recognize 5 different constellations.
Give out a gift that the other person doesn't like.
Gather 50 assembly diagrams.
Complete Phyllis's Dream
Complete the new Portia Harbor.
Completed 100 Inspections at the Commerce Guild.
Cumulatively picked up 500 feces.
Encounter the rogue knight.
Pick up 7 gifts during the Day of the Bright Sun event.
You were at fault...
Unlock all backpack slots.
Talk with other town folks over 500 times.
Place first in five fishing competitions.
Get 300 items by kicking trees.
Be ranked number one in a seasonal workshop ranking.
Complete South Block.
Try lasso roping for 50 times.
Keep the spiciness of the hotpot above 85 for 10 seconds during the Winter Solstice festival.
Defeat 30 rare monsters.
Accumulated 10 meals during dates and play dates.
Place 5 advertisements in the Portia Times for the workshop.
Defeated all the people that can spar in Portia.
Provide 100 Data Discs to the Church of the Light.
Clear all the levels in any Hazardous Ruins.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Adopt Pinky.
Provide 100 Data Discs to the Research Center.
Adopt Scraps.
Find a diamond.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Help build the Portia Bridge.
Opening Of The Museum
You missed a date.
The first photo taken with someone else.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Use 50 Fireworks in one setting.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Play the seesaw and get your playmate to catch a bird.
Accumulatively give out 50 gifts that people like.
Help fix Ack the living AI.
Win the highest possible award in the Slots mini-game.
Open 50 treasure chests.
Help the Portia Tree Farm be operational again.
Fail at cooking 1 time.
Pass the test to enter the Collapsed Wasteland.
Gain 150 points in the Dart game.
Did I just use the Blender to mix feces...?
Complete all five Dee-dee transport commissions.
Accumulate 10,000 Gols.
Cut down 200 trees.
Discover a mysterious room in Abandoned Ruins.
Forced to sleep at 3:00 in the morning.
Enter the Abandoned Ruins for the first time.
Register your workshop.
Arrive at Portia.