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