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