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