Fallout: New California is a substantial, fan-made modification (Mod) built upon the framework of the action RPG, *Fallout: New Vegas*. Released publicly in installments, this project functions as an unofficial prequel, immersing players in a new narrative adventure set in post-apocalyptic California, blending shooter mechanics with deep role-playing choices. Its value proposition lies in delivering extensive, new, high-quality content that expands the lore of the established universe for PC players.