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.
Propose to Emily in front of the Pumpkin Princess House.
Win at Cross Five 50 times.
Recognize 5 different constellations.
Used all items from the Vending Machine in the Deepest Ruins.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Successfully make 30 different dishes.
Find more than 10 Ghost Badges in a single Day of Memories event.
Throw ten parties.
Getting divorced.
You were at fault...
Complete 150 Commerce Guild commissions.
Accept the proposal from Mint.
Clear Level 100 of the Deepest Ruins.
Complete Phyllis's Dream
Get to Level 50 of the Deepest Ruins without using Vending Machines.
Have or adopt a second child.
Accumulated 10 times in the Swing mini-game where the play date is happy with the result.
Achieve the relationship "Happy Child" with your kid.
Win the highest possible award in the Slots mini-game.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Pass the trials set by Ginger's family.
Complete the adventure in the cave with Arlo.
Cumulatively picked up 500 feces.
Clear Level 50 of the Deepest Ruins.
Use 50 Fireworks in one setting.
Have maximum Stamina reach 600.
Enjoy some fireworks with Dr. Xu.
Defeat 30 rare monsters.
Have or adopt a child.
Clear Level 10 of the Deepest Ruins.
Complete the main storyline.
Throw a party.
Meet Pa.
Completed 100 Inspections at the Commerce Guild.
Achieve the best relationship with your spouse.
Enter the Deepest Ruins.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Defeat the rogue knight and All Source.
Expand the land area of the workshop to the maximum.
Unlock all backpack slots.
Getting caught by the Sky Shark Pirates.
Have maximum HP reach 2000.
Pick up 7 gifts during the Day of the Bright Sun event.
Recover 15 different types of relics.
Workshop reputation reaches Level S.
Congratulations!
Place 5 advertisements in the Portia Times for the workshop.
Place first in five fishing competitions.
Accept Gust's proposal.
Gather 50 assembly diagrams.
Try lasso roping for 50 times.
Be ranked number one in a seasonal workshop ranking.
Accumulated 10 meals during dates and play dates.
Provide 100 Data Discs to the Church of the Light.
Complete the new Portia Harbor.
Encounter the rogue knight.
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.
Play the seesaw and get your playmate to catch a bird.
You missed a date.
Adopt Scraps.
Complete South Block.
Everyone likes you!
Accumulatively give out 500 gifts.
Find a diamond.
Help build the Portia Bridge.
Opening Of The Museum
Provide 100 Data Discs to the Research Center.
Adopt Pinky.
Did I just use the Blender to mix feces...?
Get 300 items by kicking trees.
Give out a gift that the other person doesn't like.
Clear all the levels in any Hazardous Ruins.
Help fix Ack the living AI.
Help the Portia Tree Farm be operational again.
Accumulatively give out 50 gifts that people like.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Gain 150 points in the Dart game.
Fail at cooking 1 time.
Open 50 treasure chests.
Complete all five Dee-dee transport commissions.
Talk with other town folks over 500 times.
Pass the test to enter the Collapsed Wasteland.
Discover a mysterious room in Abandoned Ruins.
Cut down 200 trees.
Accumulate 10,000 Gols.
Forced to sleep at 3:00 in the morning.
The first photo taken with someone else.
Enter the Abandoned Ruins for the first time.
Register your workshop.
Arrive at Portia.