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