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