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