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