I had all 3 of those as well. In fact, they may yet live somewhere at my parents house. I'm going to have to go hunting when I'm next over there.
RO and RSR can indeed be merged. Did that a lot as a kid, but it only worked because we had a ping pong table in the basement that became a gaming table for those sessions.
Line in the Sand was a blast if you had friends who would really get into their roles. We had a house rule that anytime you chose one of the options involving giving a speech that you had to actually stand up and do so. So much fun.