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