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