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