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