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