http://www.1up.com/article2/0,4364,1429583,00.asp
Grand Theft Auto Bound For San Andreas?
By Alex Fraioli
1/8/2004
Take-Two Interactive has recently registered several names through the U.S. Patent and Trademark Office that more than likely point towards the location of the next game in the wildly popular Grand Theft Auto series. Rumors of a Vegas-based Grand Theft Auto game, "GTA: Sin City," have been running rampant for a while now, but the names registered so far show nothing to do with the city that never sleeps.
Three titles were registered by Take Two, including GTA: San Andreas, GTA 5, and GTA 6. The first two are all but confirmed to be one and the same, with a sixth entry in the series ready in the wing if and when the games' tried and true success continues. If Take-Two is considering placing any GTA game in Las Vegas, there are currently no registered names relating to such a project at this time.
Grand Theft Auto: San Andreas/GTA5 is expected to hit the market before the end of the year. Expect an official announcement from Take-Two in the near future.