Take from gamespy.
RTX Red Rock GameCube Disappears
Prophet | 20:55 | Console
Lucas Arts has quietly removed any reference to the GameCube its third-person action game, RTX Red Rock (thanks HomeLAN). At this late hour we weren't able to get information from LEC on the fate of the GameCube game, but it is obvious that any reference to it has been removed from both its product page and the game's official site. The PlayStation 2 version of the game is still scheduled for a May 2003 release.
I recall this slowly happened with N64. Companies start dropping support, until the console goes bye bye.