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