It is the year 2285, and the world has changed. Every choice made will revolutinize the future for better or worse. Built on the Classic and Legendary Fallout: New Vegas engine, this Free full on RPG based Modification brings you a brand new Fallout
Most information available is in Spanish but I found this short summary on DSO Gaming:
DSO Gaming said:A team of modders is currently working on a DLC-sized fan expansion for Fallout: New Vegas, Fallout: Nuevo Mexico. This mod promises to offer a heavily focused RPG experience , inspired by the classic games(Fallout 1 & Fallout 2), and you can find a teaser trailer for it below.
In Fallout: Nuevo Mexico, players will join multiple new factions. The mod will also offer three unique companions with a revamped companion and affinity system. Additionally, it will have various new activities, and will let you travel to various states and locations.