This game is so much like Zelda, it's sometimes hard to tell the difference.
So here's a 12 step guide for you people who can't tell the difference :

1 - Link open doors. War kicks them open.
2 - Link open locked doors with keys. In a world where Keyholes are eyes, War stab them with fist dagger.
3 - Link open chests. War punches the chests until they break, then loot what's inside.
4 - Link befriends winged fairy folks. War rip or cut the wings of everything that has a pair of wings.
5 - Link rides Epona, a noble steed. War's horse is on fire, and it's name is Ruin.
6 - Link takes advice from a Fairy. War is stalked by a sadistic torture demon.
7 - Link moves blocks to solve puzzles. War only pushes blocks when he is upstairs, to create holes in the floors to jump in. War knows the REAL puzzles are underground.
8 - Link collects rupees. War collects the souls of murdered foes.
9 - Link is an only son. War's big brother is Death. Litteraly.
10 - Link can transform into an adult. War can change into a fiery demon behemoth.
11 - Link has a sword and a shield. War wields a sword bigger than two Links, and his left hand is his shield.
12 - Link works to save the world. War works to save it, until the time he is called to actually end it.
13 - Link fishes in his minigame. War murders demons by throwing cars at them during his.

I hope it helped.

Note : Awesome game, lots of fun.

Graphics might be simple but the story and action is pretty decent. Otherwise it wouldn't give rise to Darksiders II and III. I wanna avoid spoilers here but to those who stumbled upon this game on discount/ offer, do add it to your library

7/10

Although underwhelming in the modern landscape of gaming, for its time it was one of the best among its genre.
Definitely worth playing if you like hack'n'slash or ever enjoyed a God of War game.