Infact you would have a very hard time to explain them what you actually show them.
I doubt they would be able to understand what computer generated graphics are. The problem is that you couldnt explain them what this is. A Screen you could explain like a magic mirror. And you would have to lie about the game. You could say its a mirror and you can watch a greek god through it.
They probably would have difficulties to order the things they see on the screen in the right category. Like numbers and kratos weapons.
First they would be totally amazed just of the looks maybe you could explain them that this is just a world generated from the people of your time and shows what they think of the greeks.
And you are here to ask if they like what they see.
And I think they would love it. The brutality is nothing special for them also the would probably see first time the things they imagined. That kratos kills other gods would probably change their whole mythology. I doubt you would be able to make them clear this isnt real they wouldnt believe you in the end because they saw it with their own eyes. They would interpret it as a challenge from god to test their beliefs and if they wsould listen to your words they would fail and burn in hades or whatever definetly you wouldnt be able to influence their thoughts in the direction you want. This would be so extraordinary that you would change the whole history. And if you say ok lets say they greeks wouldnt be like this and they would know this and would accept this, then they wouldnt be the greeks from the past but completly other persons.
In the end they would honour kratos as the biggest of all gods because he killed all the other ones and they would beginn to spread the word all over the world and build statues and temples and write books about him. This would probably strengthen the greek mythology and maybe you would come back and see that everybody prays to kratos instead to god.
