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