When Platinum Games took over development for Metal Gear Rising: Revengeance, that obviously had huge implications on material already made for the game. Unfortunately, Kojima Productions’ script and boss concepts were scrapped when the new team came in.
Kojima Productions producer Yuji Korekado explained to OPM UK:
“The script was finished and the boss concepts were finished. The design was finished with those levels, and the levels were at the point where we could play it through in a white box – but we couldn’t come up with a core concept to tie it all together. In the end, we couldn’t finish the game.”
Further discussing the early bosses, Korekado explained:
“Just to brag a little bit about our designs, we believe that the bosses we created for Metal Gear Solid: Rising were probably some of the best in the series, but Saito came in and said, ‘We’re not going to use these bosses.’ So you’ll not be seeing them this time around.
“…the bosses in Metal Gear Rising: Revengeance are very unique characters, and are game design-driven. As an action game, we believe that the bosses should resemble the dynamics of the design, and although they’re very unique, we believe that these characters very much fit into the Metal Gear world. And we hope you guys feel the same when you see them.”
Platinum Games director Keiji Saito feels that Rising’s first round of bosses were very much like traditional Metal Gear Solid bouts. Players would have required more stealth and cunning to prevail.
“as Korekado says, the boss battles and the bosses in general were completely different at the time. There were a lot of stealth concepts that were [being done] internally at Kojima Studios. Now that it’s an action game we had to revamp that, and Platinum Games provided a lot of input and a lot of ideas.”
And finally, speaking about the collaboration between Kojima Productions and Platinum Games, Saito said that the team looked at the original concept in making the new version:
“we believe there’s a lot of flexibility for both sides. Boris was included in the initial Kojima Productions concept, and is included in Revengeance as well. We did, of course, look at [the initial version of the game] and refer to it, and there are some characters we reused from the original concept. Ultimately, the most important concept that we needed to stay within is the Metal Gear world.”