Without a doubt my most favorite game series ever. It's so hard to choose which one is the best! Everyone that I know whose only played MGS4, I recommend then MGS1 on and they fall in love with it. You really can't appreciate everything in MGS4 without playing the first 3. It makes everything in 4 so much more epic! I was seriously shitting bricks when I first played MGS4 because of everything that was revealed.