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