Here is the full list of all 30 Darksiders Genesis achievements. It takes around 30-35 hours to unlock all of the achievements on Windows.
Defeat Mammon Lord of Hell.
Defeat Belial Lord of Hell.
Defeat Astarte Fallen Angel.
Defeat Dagon Lord of Hell.
Defeat Moloch Lord of Hell.
Achieve a score of 70000 or higher in the arena.
Complete all 17 levels on Hard difficulty.
Complete all 17 levels on Apocalyptic difficulty.
Learn all 3 of Strife's Wrath abilities.
Learn all 3 of War's Wrath abilities.
Find all 5 of Strife's elemental ammo types.
Find all 5 of War's elemental enhancements.
Collect every type of creature core.
Collect 50 Boatman Coins.
Collect 200 Boatman Coins.
Collect 350 Boatman Coins.
Destroy all 4 Soul Caches in The Slag Pit.
Gather all the ingots in the Inferno Vault and take them to Hell's Forge.
Close the rift leaking void creatures in Icebind Cavern.
Defeat less than 5 hounds before killing the Houndmaster in The Horde.
Defeat the Dread Lord's subjects in Decay.
Defeat every snake in Decay.
Save the uncorrupted angels in Bastion's Fall
Defeat the grub queen in The Maelstrom.
Destroy all 12 of Moloch's supply caches in War Machine.
Destroy 10 structures in War Machine.
Defeat Moloch without taking damage.
Collect every Boatman Coin in the Boatman's Labyrinth.
Unlock every Trickster Door.
Face the Trickster himself Wicked Killington.