Out of all Call Of Duty games I've played through and enjoyed Call Of Duty 2: But Red One the most, just did another playthrough of this game today, it's one of those video games that I;ve played over and over again and still have a good time. One thing that is good is this game keeps the violence to being barely violent at all, because if this game were more realistic I don't think I would like it, since real war is hell and full of hatred, blood and gore. even Well there is no gore in mostly all 6th and 7th generation Call Of Duty Campaigns. But of course Call Of Duty is only a Teen rating in the US so maybe that is why.
I've played through all the modern warfare games and although this is a lot more violence and blood, the game still don't resemble the real horror of war in which is what makes the older Call Of Dudy games better.
And I play games like Duke Nukem, and Shadow Warrior, and Doom, but the appeal of fighting with other fighters bots or not it is still an experience that it amazed me that the game had coop fighting amongst bots. even though their AI is not the greatest.