bones

I'm really interested in playing Renegade X but I currently reside at my school, which does not allow torrenting games. I realize that there are other download options, but I'm curious if this is a completely separate standalone game, or something that can be purchased. Is downloading Renegade X legal? I'm asking this because I am not sure if it is a mod since it was essentially a remake of a game, so it's kind of worrying me. Seems too good to be true that this is free