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