DucksUnlimited on 19 January 2014
I'm assuming you have a Wii/Gamecube? I would say you should try out MGS: The Twin Snakes, which is an updated/enhanced version of the original Metal Gear Solid, and see if you like it. You probably will have issues following the story in 4 without playing earlier games.
AFAIK in The Phantom Pain you play as Big Boss, which is the character you play as in the third game and a character who is heavily referenced in the series. The gameplay also seems to be very different. I wouldn't suggest Starting with 5 based on what we know so far.
