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