It's to simbolize Big Boss becoming an evil douche.

Big Boss >>>>>>>>>>>>>>>>>>>>>>>> Solid Snake

The funny thing I noticed is that the series is completely insane

And I love it for that

(not such a fan of stealth games though unfortunately)

I want a puzzle stealth game where you play Otacon during the events of MGS1.

The title is actual messed up in my opinion.

Metal Gear 1 -> Metal Gear 2: Solid Snake then Metal Gear Solid -> Metal Gear Solid 2(Main Raiden?) then prequel Metal Gear Solid 3(Main Naked Snake aka Big Boss?) then back to sequel Metal Gear Solid 4(yay Main Solid Snake but you made him old man -.-) & theeeeeeeeeen back to prequel Metal Gear Solid 5( Again Big boss )

MMMMM!!! O.o

• 1964 – Snake Eater - Big Boss
  
• 1970 – Portable Ops - Big Boss
  
• 1974 – Peace Walker - Big Boss
  
• 1975 – Ground Zeroes - Big Boss
  
• 1984 – The Phantom Pain - Big Boss
  
• 1995 – Metal Gear - Solid Snake
  
• 1999 – Solid Snake - Solid Snake
  
• 2005 – Metal Gear Solid - Solid Snake
  
• 2007/09 – Sons of Liberty - Solid Snake/Raiden
  
• 2014 – Guns of the Patriots - Solid Snake
  
• 2018 – Rising: Revengeance - Raiden

Just thought I would point out who you play as in each game, Solid Snake ≠ Big Boss

But he is just a lump of flesh in MGS4, what kind of game that would be? Suuper Meat Boy?

I like whatever Hideo Kojima decides. I trust his game maker skills.