Para complementar, del FAQ del subreddit (https://www.reddit.com/r/metalgearsolid/wiki/faq/):

>To put it simply, for the BEST overall satisfaction, it is highly recommended that you play the games in order of release and NOT chronological order.
>Please realize if you play the games in [crhonological order], you run the risk of being spoiled or very confused at some points and while the experience may still be somewhat enjoyable, it's not recommended.