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