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