All the reasons so far stated are valid. I started RM with RM2, but as I began my own game, I ran it with RMSS, and simply had no desire for the others. RMSS had a excellent skill system, combat was lethal and made you think about your actions. The only thing I found I would of liked to see, is a level free version, and piece by piece armor, though I hear that is now dealt with in the Arms companion. I just hope RMC does not become the monster that RM2 became at the end.