I have played through RFOM several times
have beaten easy/medium/hard/ and am working on superhuman.
It is a descent game and has exciting gameplay. its dynamic environments are really good.
the weapons are also really sweet(the bullseye mark II especially)
the graphics could be better, but are still quite good.
I have run into some glitches along the way though.
-indestructible chimera(they just stand there)
-can get through wall(shouldn't be able to)
-blind chimera?(holding gun, even moves when you hit it!, but doesn't see me!)

overall, is a great game!!!