Aside from its reputation as a storytelling masterpiece, Metal Gear Solid 4: Guns of the Patriots is known for two things: absurdly long cinematic cutscenes and plot twists. But, as it turns out, the development of the game has just as big of a plot twist as the one that happened at the end.
Apparently, the fourth mainline entry in the legendary Metal Gear Solid franchise wasn't just planned for the Xbox 360 - it was actually fully operational for the Xbox's flagship console at the time.
In what's easily the biggest revelation about Metal Gear since the announcement of Metal Gear Solid Delta: Snake Eater, Ryan Payton, the game's assistant producer, confirmes this fascinating detail in an interview for "The Ultimate History of Video Games Vol 2" by Steven L. Kent, as pointed out by Time Extension.

Despite being revered as a PlayStation 3 exclusive, Payton states that Konami, the developer behind the iconic series, had initially intended to make Metal Gear Solid 4 a multi-platform title. According to Payton, MGS4 was in active development for the Xbox 360, and at one stage, it was "running beautifully and smoothly" on Microsoft's console.



