There is a classic UT mutator included, but it doe not give you back the Ripper - sadly. Otherwise there are many "Remake" maps included which are very faithful to the original. The Classic UT mutator makes the Rocket Launcher load 6 rockets at once, alternatively fire grenades, just like the old one. Only the Ripper seems to be gone forever, if not someone creates a Mod for that.
BTW: Face Classic is very true to the original, only the Ripper has been replaced by the Link Gun.

It´s a great game and I would really recommend it. You just need some real horsepower (Single 1 GHz or Dual 800 I guess) with some decent Video Card, or the game will be slow - especially in Onslaught and Assault modes.