Chris9417
2559, during the Banished ambush over Zeta Halo, the battered UNSC Infinity-class supercarrier makes a desperate, malfunctioning slipspace jump to evade destruction. The experimental Forerunner-enhanced drive rips a rift through realities, hurling the ship to an alternate Earth devastated by nuclear apocalypse in 2077. Emerging in 2281 over the Mojave Wasteland, the Infinity crash-lands amid the ruins of Las Vegas, its hull scarring the desert near Hoover Dam. Aboard are ~17,000 survivors: Spartans, Marines, ODSTs, scientists, and the ship's AI Roland (damaged but operational).
Simultaneously, in Goodsprings, the female Courier awakens after Benny's betrayal, embarking on her quest for the Platinum Chip-a device that could upgrade Mr. House's Securitron army and tip the balance of power at Hoover Dam. The Infinity's arrival shatters the Mojave's fragile stalemate: NCR, Caesar's Legion, House, and minor factions like the Boomers, Brotherhood of Steel, and Great Khans react to this "star-fallen fortress" and its godlike tech. The Courier, drawn by rumors of "metal gods from the sky," intersects with UNSC survivors, forging an alliance that could reshape the wasteland-or doom it if the Infinity's Forerunner artifacts awaken ancient horrors.