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