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