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.
Complete 150 quests.
Catch 2500 fish.
Complete all Personal Goals.
Catch 2500 bugs.
Chop 6000 trees.
Mine 6000 ores.
Visit the Edge of Solemn.
Unlock all ultimate upgrades at the Crafting Workshop.
Donate all items to Museum.
Gather 4000 items.
Harvest 4000 crops.
Discover All Tavern Recipes.
Chop 3500 trees.
Get Married.
Harvest 2500 crops.
Gather 2500 items.
Mine 3500 ores.
Upgrade all structures and areas to 10 stars.
Catch 1000 fish.
Complete 100 quests.
Catch 1000 bugs.
Adopt a pet.
Unlock all town wishes.
Craft 2500 items.
Chop 1500 trees.
Harvest 1000 crops.
Mine 1500 ores.
Catch 500 fish.
Gather 1000 items.
Sell 1500 items.
Complete 50 quests.
Catch 500 bugs.
Harvest 500 crops.
Meet 15 Townsfolk.
Craft 1000 items.
Gather 500 items.
Chop 750 trees.
Catch 250 fish.
Meet 12 Townsfolk.
Complete 25 quests.
Mine 750 ores.
Sell 700 items.
Catch 250 bugs.
Harvest 100 crops.
Complete 10 quests.
Meet 10 Townsfolk.
Craft 500 items.
Sell 50 items.
Sell 100 items.
Sell 300 items.
Catch 100 fish.
Craft 250 items.
Gather 100 items.
Catch 100 bugs.
Mine 150 ores.
Chop 150 trees.
Meet 5 Townsfolk.
Craft 100 items.
Meet 3 Townsfolk.