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.
Achieve a score of 70000 or higher in the arena.
Defeat Dagon Lord of Hell.
Defeat the grub queen in The Maelstrom.
Find all 5 of War's elemental enhancements.
Defeat Astarte Fallen Angel.
Collect 200 Boatman Coins.
Defeat Belial Lord of Hell.
Learn all 3 of War's Wrath abilities.
Defeat the Dread Lord's subjects in Decay.
Defeat Mammon Lord of Hell.
Learn all 3 of Strife's Wrath abilities.
Gather all the ingots in the Inferno Vault and take them to Hell's Forge.
Collect 50 Boatman Coins.
Destroy all 4 Soul Caches in The Slag Pit.
Defeat Moloch Lord of Hell.
Complete all 17 levels on Hard difficulty.
Complete all 17 levels on Apocalyptic difficulty.
Find all 5 of Strife's elemental ammo types.
Collect every type of creature core.
Collect 350 Boatman Coins.
Close the rift leaking void creatures in Icebind Cavern.
Defeat less than 5 hounds before killing the Houndmaster in The Horde.
Defeat every snake in Decay.
Save the uncorrupted angels in Bastion's Fall
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.