Here is the full list of all 48 Battle Chasers: Nightwar achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Finish the game on NG+
Unlock 100% of the Lore Book
Complete 100% of the Bestiary
Craft 10 Epic Items
Craft 10 Rare Items
Unlock all Hero Skins
Unlock a Hero Skin
Complete all dungeons on Legendary difficulty
Start NG+
Kill C'drall
Defeat the Pirate Captain
Complete the Fishiary
Acquire all of the Heroes' Ultimate Weapons
Get Max Score in the Battle Arena
Unlock All Battle Bursts
Kill all the Beastmaster's Targets
Get all three chests in The Winding
Reach level 30
Complete the Mana Rifts
Acquire 100,000 gold
Craft 50 items
Craft a legendary item
Acquire 1 of the Heroes' Ultimate Weapons
Complete the Crimson Garden
Complete Strongmont
Complete 50% of the Bestiary
Unlock 50% of the Lore Book
Get a Mid level score at the Battle Arena
Complete Deadwatch
Kill 500 enemies
Bring Alumon into the party
Acquire 200 Shadow Coins
Craft an item with less than 10% success chance
Complete The Dig
Unlock a Level 3 Battle Burst
Complete Junktown
Find Monika
Catch 50 Fish
Kill one of the Beastmaster's Targets
Find Knolan
Complete the Path of Fangs
Complete a dungeon on Legendary difficulty
Catch an Epic Fish
Unlock a Beast Perk
Craft an item
Complete the Iron Outpost
Recover an item from the Mystery Cube
Make it to the road