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