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