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