Here is the full list of all 50 Darksiders II achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Defeat Absalom
Complete the game on any difficulty setting
Complete the game on NORMAL
Complete the game on APOCALYPTIC
Open The Well Of Souls
Complete Lord of the Black Stone
Defeat Samael
Complete The Mad Queen
Collect the Phasewalker
Unlock All Combat Moves & Upgrades
Complete Stains of Heresy
Defeat Archon
Collect the Voidwalker
Unlock the final skill in either skill tree
Complete The Rod of Arafel
Complete City of the Dead
Defeat the four creatures named by Thane
Defeat The Wailing Host
Collect the Soul Splitter
Defeat Basileus
Collect the Interdiction Stone
Complete The Toll of Kings
Complete The Lord of Bones
Complete Tree of Life
Defeat the Guardian
Complete Heart of the Mountain
Your First Respec
Collect Deathgrip
Level Up Your 1st Possessed Weapon
Complete To Move a Mountain
Complete Tears of the Mountain
Unlock Reaper Form
Complete Fire of the Mountain
Collect Redemption
First use of Fast Travel
Defeat the Crowfather
Complete 3 different high dives in the Foundry
Complete GnoMAD
Complete The Book of the Dead
Equip elite items to all slots
Complete all Secondary Quests
Defeat Wicked K
Complete The Crucible
Open all Death Tombs
Complete Lost Relics
Defeat the Soul Arbiter
Death Reaches Level 30
Gift An Item To A Friend
Complete Sticks and Stones
Unlock Everything