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