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