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