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