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