Here is the full list of all 43 Darksiders achievements. It takes around 30-35 hours to unlock all of the achievements on Windows.
Unlocked Everything
Kill 666 Demons
Kill 160 enemies while on the angelic beast
Max out all weapons and unlock all combat moves
Forge the Armageddon Blade
Kill 150 Demons from horseback
Ride for 100 miles
Collect the Abyssal Armor Set
Collect the maximum amount of wrath cores
Collect the maximum amount of lifestones
Collect All 27 Artifacts
Collect all the Wrath Powers
Collect the Mask of Shadows
Kill 150 enemies with items from the environment
Collect the Abyssal Chain
Shed 3000 gallons of demon blood
Collect Mercy
Defeat The Griever
Collect the Tremor Gauntlet
Defeating more Angels than Ulthane
Meet Ulthane
Collect the Chaos Form Ability
Defeat Tiamat
Kill 5 duskbats without touching the ground
Kill 10 enemies with one Blade Geyser wrath attack
Take out a helicopter with a car during the apocalypse
Defeat the game on APOCALYPTIC
Defeat the game on NORMAL
Complete the game on EASY
Defeat The Destroyer
Defeat Straga
Collect the Voidwalker
Collect The Scythe
Defeat Silitha
Search 150 chests
Defeat The Stygian
Obtain Ruin
Gain the Chronomancer Ability
Collect the Crossblade
Gain the Shadowflight Ability
Free Samael from his prison
Collect the Earthcaller
Meet Vulgrim