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