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