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