disregard this post i found a post with the same question and some answers to my question.....!!!!

How do you kill Achilles in the arena? when your on trial. i got past the first two fights with no problem but when i go up against Achilles nothing i do seems to  slow him down. he  just beats me down with  his twirling spear I know at first Daedalus  says his weakness is his vanity? but i don't stay alive long enough to find out how to use  it against him.

Yeah I found him to be the hardest encounter in the game as well.
What you need to do is attack him when he's raising his arms and taunting for the crowd. Keep dodging as often as you can, just run in circle is you must.
Allow him to strike at times, and quickly dodge, as he makes his attack you can dodge around him and pull in a few good attacks to his backside.
Keep this up until he's flashing red, that's when you know he's close to defeat. He'll also start pulsing and become more aggressive as you finish him off.
If you have "Appollo's Healing Beacon" ability it will help you out the most here.
As you dodge so much, I also found Herme's "Spirit Trail" ability to be very helpful as well at the beginning stages of the battle.

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Only the elements time cannot wear were forged before me, and beyond time I stand. Post provided "as is"; confers no rights!

Cover behind your shield.
When he starts his attacks bump out your spear.
If you are low on health, just cover until you are recovered.

I've got some bad news.

Since his mother Thetis dipped him in the River Styx he cannot be killed through your mortal efforts.

Perhaps if you were able to strike him at the place where her fingers held him when he was dipped as a child you might have a chance, but not if the fates have other plans... which they do.

Azrael

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Respect The Call.

i blocked until he does an attack just as he completes it hit x twice. it takes a while but you will do it. Also try dodging behind him and using y for a heavy strike

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take a bow son, take a bow.

Andy Gray on Gerrard.!

I just ran and when he started to chase me hit him.

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 P u R D o N x wrote:

Mexico is a part of Spain.

ROFLMAO!!!!!!

lol okay i've tried standing there with my shield between us (the controls on this game suck!)...but when i get him down where he's red and such...he seems to blow past me and keep knocking me over killing me. No matter if my shield is between us or not. I've tried distancing myself and dodging, but he keeps turning with me hitting me in teh back since my shield is between us as i try to run around him...thus nine tries and still can't beat this guy...any more suggestions other than breaking the disc? lol