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