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