According to Ryan Payton, who worked at Kojipro at the time, MGS4 was ruinning on a Xbox360 dev kit and staff + Konami wanted the game to release on it, Kojima refused
Ryan Petton clarifies MGS4 exclusivity in History of Games book - there was never a Sony deal, Kojima simply chose to not port it to Xbox. | ResetEra
Xbox Live Boss Says The 360 Can "Definitely" Handle MGS4 - The Escapist
Metal Gear Solid 4: Guns of the Patriots - Wikipedia
Metal Gear Solid 4: Guns of the Patriots (Video Game 2008) - IMDb
Metal Gear Solid 4 on Xbox 360? Big fucking deal! :: THE SNAKE SOUP
Amazon.com: Metal Gear Rising Revengeance - Xbox 360 : Konami of America: Everything Else
MGS4 For Xbox360 (@MGS4MGS1Xbox360) / Twitter
Sony didn't pay for Metal Gear Solid 4 exclusivity ; Kojima did not want to make the port for Xbox 360 : r/metalgearsolid
/cdn.vox-cdn.com/uploads/chorus_image/image/12571661/mgs-legacy-11.0.jpg "Metal Gear Solid: Legacy Collection not coming to Xbox 360 because data size still an issue - Polygon")
Metal Gear Solid: Legacy Collection not coming to Xbox 360 because data size still an issue - Polygon
Why Metal Gear Solid 4 Didn't Go To Xbox Is Pretty Silly - Geek Ireland
Metal Gear Solid 4: Existence Xbox 360 Box Art Cover by jmariamellinas
Amazon.com: Metal Gear Solid HD Collection : Konami of America: Everything Else
Metal Gear Solid 4 -Remastered- | Game Ideas Wiki | Fandom
Why The Xbox 360 Won't Get The Metal Gear Solid: Legacy Collection
Why Metal Gear Solid 4 Didn't Go To Xbox Is Pretty Silly - Geek Ireland
360 MGS4, next GTAIV DLC topping Microsoft's E3 lineup? - GameSpot
Five reasons why Metal Gear Solid 4 is not released on Xbox 360, five reasons to be released on the contrary - GIGAZINE
Metal Gear Soild : Guns of the Patriots Xbox 360 Box Art Cover by dragontear
Japanese business journal removes MGS4 on Xbox 360 quote
