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