I had an idea for a GTA game set in the American Southwest, primarily focused on an Arizona-New Mexico hybrid area named Tierra Robada, with the main city being Dragon City (working title), based primarily off of Phoenix, Arizona and the surrounding metropolitan areas, with some elements borrowed from Alburquerque and Tuscon. Other areas would be the state of Sierra (Nevada, with the primary city there being Las Venturas) and Nuevo Paraiso (Northern Mexico, with Chuparosa returning from RDR, this time based on Ciduad Juarez and Nuevo Laredo, both affected heavily by the Drug War), however Dragon City and the state of Tierra Robada would be the central location. There would be a lot of desert and mountain landscapes and landmarks such as the Roosevelt Dam (Hoover Dam), Imperial Cliffs (Grand Canyon), the Wild West village of Coffin Rock and the nearby Mediocre Ranch (Tombstone and the O.K. Corral), West Elizabeth River (Colorado River), Rio Bravo (Rio Grande), more of Route 68 would be explored, and the main storyline would focus on the Mexican Drug Wars, with the cartels as antagonists.
That being said, I've always wanted to create a Yakuza-themed concept and while the real-life Yakuza in the United States is primarily based in Hawaii with a few minor offshoots in California, I decided to merge the two ideas together and focus on a small-time Yakuza gang based in the Southwest that is at war with the Mexican Cartels, while allied with traditional East Asian gangs back in San Fierro and Los Santos.
There would be only one main protagonist (though a second protagonist becomes playable after a certain point very late into the storyline), but it would be very good with multiple endings and choices akin to IV.
Some of the gangs I've come up with for the concept thread.....
Uchiha Group: A Yakuza gang based in the Southwestern United States with ties to Yakuza gangs in both the USA and Japan. Relatively small-time, but have assets in both Dragon City and Las Venturas, and have recently begun to deal in crystal meth, marijuana, MDMA, and designer drugs. This excursion into the drug trade has put them at war with the ultra-powerful cartels down in Mexico. And yes, I stole the name Uchiha from the Naruto anime. Names aside, the two have nothing in common.
Los Equis: The most powerful cartel in Mexico and arguably the entire planet, Los Equis were once a unit of the Mexican Army's special forces before going into the drug trade and becoming rogue agents. They are ultra-violent and well organized, Los Equis is based heavily off of Los Zetas.
Knights Hospitaller Cartel: A rival drug cartel opposed to Los Equis which is powerful but less ruthless towards civilians because of their strong Catholic tradition. The Knights Hospitaller Cartel are potential allies with the Uchiha Group as both are opposed to Los Equis, and as one can obviously tell, the Knights Hospitaller Cartel are based off the Knights Templar Cartel.
Marabunta Grande 13: Returning from GTA V, the MG-13 are a street gang with sets all over the Southwestern United States and parts of Mexico, they are close allies with Los Equis, much like MS-13's alliance with Los Zetas.
Huns MC: A biker gang consisting primarily of Hispanics and Caucasians that was formed in the early 1970's, the Huns MC are a bit of a wild card in the storyline. Based on the Mongols MC.
Gambetti Family: An Italian Mafia family based in Liberty City with assets in Las Venturas, who can be of assistance to the protagonist while in Las Venturas, in exchange for some favors of course.
Eastboro Baptist Church: A fanatical, hateful, and evil cult based in the Midwestern United States that holds a firm belief that God hates anything and everything (and we do mean anything and everything) and is infamous for picketing funerals and harassing innocent people, the EBC have established a compound in the desert that the main protagonist launches a raid on following a botched arms deal (a raid that takes place during a tense standoff between the cult and the FIB). Even white supremacist groups like the Angels of Death MC consider them extreme (and the Angels of Death have been known to launch counter-protests). Their leader is Frank Phillips, a lunatic cult leader. Three guesses as to who the Eastboro Baptist Church are based on, and the first two don't count.
As for their leader, Frank Philips is based on multiple figures, namely Westboro Baptist Church's former leader Fred Phelps, their current leader Steve Drain, as well as drawing heavy inspirations from cult leader David Koresh. And no, this is not an attack on all religion (I am religious myself, though I am not a Christian, but many of my close family members are), it's just that a group so over-the-top and ridiculous as the Westboro Baptist Church is make them so ripe for parody and satire in all honesty.