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