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