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