A new patch for the PC version of Metal Gear Rising: Revengeance has been released on Steam last friday. Here is the report as posted by Konami on the Steam website:
A new patch for METAL GEAR RISING: REVENGEANCE went live this morning (3/7/14) to correct some of the most common issues as reported by internal teams and fans. Including:
– Fixed issue where game would crash when resolution was adjusted at certain points in the game.
– Fixed crash that would occur when no “C Drive” was found. Game no longer crashes, but saved data will not synchronize with Steam Cloud unless there is a “C Drive” on the system.
– Fixed bugs where Armstrong would not drop Repair Nanopaste and would not trigger the final QTE when framerate was set to less than 60fps.
Source: Steam, via TheSnakeSoup