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