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