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