But it's for the Dreamcast.
The Japanese version has an expansion disc which allows you to play the game with the classic UC gundam mecha (RX-78, Guncannon, and Guntank).
If you happen to have a Dreamcast (especially a Japanese one, or a boot disc) you may want to try and pick up this Gundam game:
It's not hard for non-japanese speaking people to figure out, and it's a great deal of fun to play.
It's a real-time strategy game, so be forwarned if you don't like that kind of gaming.