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