Look what Yigytugd from Playtation forums did with God of War Chains of Olympus. He beat the game with out using any upgrades on his powers. Here is his post.
"Well I have done it. I beat the game without upgrading any of my powers (on easy mode) but still hard.
http://www.sendspace.com/file/lqlumi (link to save data)
Pretty nice that he really beat it on only using the basic powers.
Here is the link to his post: http://boardsus.playstation.com/play...hread.id=10739