Fallout: New California adds an all new story around a new player character, an adopted resident of Vault 18, embarking on a journey through the wastelands of the New California Republic's Cajon Pass. An unofficial prequel to New Vegas, FPB adds hours of new gameplay and a fully voiced stand alone campaign.
The beta ended so quickly :( The story is really drawing me in and I loved the minigame to get the robot, quiet surprised FO:NV didn't have such a minigame.