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