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