RF1 was pretty good but I never got around to playing RF2. I remember playing RF1 at the Volition offices with some of the other Volition Watch staff members - Remora, Orange, and Dynamo. We were deathmatching it up against some of the Volition guys who had some time to spare...it was an absolute riot and the Volition staff really highlighted the use of the Geo-Mod in the deathmatch as they were blasting tunnels into separate areas and then suddenly...bammo...rocket from nowhere.
That was definitely the most fun I had with that game. Single player was fine and the weapons were modestly cool. Lots of style I thought as well...but never really caught on. Here's hoping that the new game takes geo mod to the next level and they can really make a solid game. For PC too...