I have had this game for awhile but never really got it started though. But I am thinking about starting it up as I have heard it was really good.

I bought it even though I am not really into shooter types of games but got it anyway because they said the story was really good. But I never really got into getting started with it.

Anyway but what I want to ask is is it kind of a necessity to have a game guide or a walkthrough while playing through it. Or can you play through it pretty easily without a game guide.