Here is the full list of all 40 Stardew Valley achievements. It takes around 150-200 hours to unlock all of the achievements on Windows.
Earn 1,000,000g
Ship 300 of one crop.
Reach level 10 in every skill.
Craft 30 different items.
Upgrade your house to the maximum size.
Restore the Pelican Town Community Center.
Cook 25 different recipes.
Reach a 10-heart friend level with 8 people.
Reach a 5-heart friend level with 20 people.
Earn 250,000g
Reach level 10 in a skill.
Cook 10 different recipes.
Complete 40 'Help Wanted' requests.
Reach the lowest level of the mines.
Reach a 5-heart friend level with 10 people.
Reach a 10-heart friend level with someone.
Reach a 5-heart friend level with 4 people.
Donate 40 different items to the museum.
Earn 50,000g
Reach a 5-heart friend level with someone.
Upgrade your house.
Complete 10 'Help Wanted' requests.
Catch 24 different fish.
Craft 15 different items.
Earn 15,000g
Catch 100 fish.
Catch 10 different fish.
Earn 10,000,000g
Complete the museum collection.
Cook every recipe.
Craft every item.
Catch every fish.
Ship 15 of each crop.
Ship every item.
Beat 'Journey Of The Prairie King'.
Become a Joja Co. member and purchase all the community development perks.
Find every stardrop.
Beat 'Journey Of The Prairie King' without dying.
Get married and have two kids.
Complete all of the Adventure Guild Monster Slayer goals.