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