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