The first glimpses of Raiden’s alternate costume in Metal Gear Rising: Revengeance have now been revealed by Team Kojima, and it looks similar to the Raiden we all know and love (hate?) from Metal Gear Solid 2: Sons of Liberty.
You won’t find this alternate outfit by slicing away baddies, however, but by pre-ordering the game from the almighty GameStop. While this exclusivity may be the case now, something tells me the outfit will become available as a downloadable eventually. European gamers, though, will get the costume pre-loaded.