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