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