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