Ahhh ignorant fanboy, did you ever play halo? You can get melee'd by any elite no problem, so any guardian melee would easily disintegrate chief. Also, he can get killed by their plasma weapons quite fast, so chief is far from invincible. No i didnt read any of the books, but i'm talking from in game experience on both ends. Guardians are capable of much more destruction than any spartan. It's a fact. [spoiler]He only survived the fall from orbit due to armor lock, so that argument is invalid. Also, i've survived rockets to the chest as a titan, so that doesn't impress me.[/spoiler]

gameplay≠canon