Here is the full list of all 60 Littlewood achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Complete 150 quests.
Catch 2500 fish.
Complete all Personal Goals.
Complete 100 quests.
Donate all items to Museum.
Catch 2500 bugs.
Find all Tarott Monster cards.
Gather 4000 items.
Unlock all ultimate upgrades at the Crafting Workshop.
Discover All Tavern Recipes.
Visit the Edge of Solemn.
Unlock all town wishes.
Chop 6000 trees.
Mine 6000 ores.
Get Married.
Harvest 4000 crops.
Chop 3500 trees.
Gather 2500 items.
Catch 1000 fish.
Mine 3500 ores.
Catch 1000 bugs.
Craft 2500 items.
Complete 50 quests.
Adopt a pet.
Harvest 2500 crops.
Upgrade all structures and areas to 10 stars.
Catch 500 fish.
Catch 500 bugs.
Mine 1500 ores.
Chop 1500 trees.
Harvest 1000 crops.
Complete 25 quests.
Gather 1000 items.
Sell 1500 items.
Catch 250 fish.
Meet 15 Townsfolk.
Harvest 500 crops.
Catch 250 bugs.
Craft 1000 items.
Complete 10 quests.
Gather 500 items.
Sell 700 items.
Mine 750 ores.
Chop 750 trees.
Catch 100 fish.
Catch 100 bugs.
Meet 12 Townsfolk.
Sell 300 items.
Harvest 100 crops.
Craft 500 items.
Gather 100 items.
Sell 50 items.
Sell 100 items.
Meet 10 Townsfolk.
Craft 250 items.
Mine 150 ores.
Chop 150 trees.
Craft 100 items.
Meet 5 Townsfolk.
Meet 3 Townsfolk.