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