MGS Ground Zeroes is not Project Ogre
Metal Gear Solid: Ground Zeroes is an open world game developed in the Fox Engine by Kojima Productions. That squares with what we know about "Project Ogre," an "open ground" game in the Fox Engine. However, they are not the same.

In a frustrated tweet, Hideo Kojima, head of Kojima Productions, said that "Project Ogre is the project that Ogre appears," noting "Ogre does not appear in 'MGS Ground Zeroes' trailer." While the specifics of the refutation are still in question – is "Ogre" a character in addition to representing "open ground?" – the overall message is clear: Project Ogre and Ground Zeroes are different.

Of course, that would mean KojiPro is working on two open world games at the same time, which seems insane.

This article was originally published on Joystiq.