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