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