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.
Throw ten parties.
Win 20 games of Rock Paper Scissors in 3-0 fashion.
Try lasso roping for 50 times.
Defeated all the people that can spar in Portia.
Used all items from the Vending Machine in the Deepest Ruins.
Getting divorced.
You were at fault...
Successfully make 30 different dishes.
Accept the proposal from Mint.
Have or adopt a second child.
Win at Cross Five 50 times.
Complete Phyllis's Dream
Complete 150 Commerce Guild commissions.
Achieve the relationship "Happy Child" with your kid.
Clear Level 100 of the Deepest Ruins.
Accept Gust's proposal.
Accumulated 10 times during the Doodles mini-game where the play date is happy with the result.
Find more than 10 Ghost Badges in a single Day of Memories event.
Pass the trials set by Ginger's family.
Play the seesaw and get your playmate to catch a bird.
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.
Complete the adventure in the cave with Arlo.
Use 50 Fireworks in one setting.
Clear Level 50 of the Deepest Ruins.
Win the highest possible award in the Slots mini-game.
Complete all five Dee-dee transport commissions.
You missed a date.
Cumulatively picked up 500 feces.
Enjoy some fireworks with Dr. Xu.
Get 300 items by kicking trees.
Have maximum Stamina reach 600.
Finish with a over 90% accuracy rate in the Balloons mini-game.
Get to Level 50 of the Deepest Ruins without using Vending Machines.
Have or adopt a child.
Throw a party.
Defeat 30 rare monsters.
Place first in five fishing competitions.
Accumulatively give out 500 gifts.
Complete the main storyline.
Accumulated 10 meals during dates and play dates.
Clear Level 10 of the Deepest Ruins.
Meet Pa.
Recover 15 different types of relics.
Achieve the best relationship with your spouse.
Everyone likes you!
Keep the spiciness of the hotpot above 85 for 10 seconds during the Winter Solstice festival.
Workshop reputation reaches Level S.
Adopt Scraps.
Enter the Deepest Ruins.
Completed 100 Inspections at the Commerce Guild.
Get more than 40 Ghost Badges in Haunted Cave Exploration.
Unlock all backpack slots.
Expand the land area of the workshop to the maximum.
Forced to sleep at 3:00 in the morning.
Recognize 5 different constellations.
Did I just use the Blender to mix feces...?
Fail at cooking 1 time.
Defeat the rogue knight and All Source.
Getting caught by the Sky Shark Pirates.
Accumulatively give out 50 gifts that people like.
Pick up 7 gifts during the Day of the Bright Sun event.
The first photo taken with someone else.
Clear all the levels in any Hazardous Ruins.
Have maximum HP reach 2000.
Gather 50 assembly diagrams.
Provide 100 Data Discs to the Church of the Light.
Congratulations!
Encounter the rogue knight.
Talk with other town folks over 500 times.
Complete the new Portia Harbor.
Be ranked number one in a seasonal workshop ranking.
Complete South Block.
Adopt Pinky.
Gain 150 points in the Dart game.
Help build the Portia Bridge.
Opening Of The Museum
Find a diamond.
Provide 100 Data Discs to the Research Center.
Help fix Ack the living AI.
Open 50 treasure chests.
Help the Portia Tree Farm be operational again.
Cut down 200 trees.
Accumulate 10,000 Gols.
Discover a mysterious room in Abandoned Ruins.
Pass the test to enter the Collapsed Wasteland.
Give out a gift that the other person doesn't like.
Enter the Abandoned Ruins for the first time.
Register your workshop.
Arrive at Portia.