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