Fallout: New York, a free browser game written with Claude Opus 5.5, is offline after its creator received a cease-and-desist notice from Bethesda. X user Chris First revealed the project on September 28, and the reveal video reportedly passed 3.5 million views. It only lasted a few days, however. Apparently, the notice came from ZeniMax Media, Bethesda's parent company, and said that it is obliged as a trademark owner to "monitor and enforce against the unauthorized and infringing use of its trademarks." The game has since been set to private, and Bethesda hasn't commented publicly so far.

The project was quite ambitious for something an AI model wrote. First claimed 117 locations, 112 characters, and 46 weapons, along with quests, dialogue trees, V.A.T.S., and a working Pip-Boy. It shipped without any texture or sound files, with First saying that "every building, weapon, face, and sound is generated by code." Of course, a game using the Fallout name was always going to get noticed by the lawyers, free or otherwise. Similarly, mere days ago, Take-Two sent a cease-and-desist to a project trying to bring GTA 5 to Android. As for official Fallout games in the pipeline, Bethesda has confirmed four Fallout games in development, and inXile Entertainment is also reportedly working on a new one.