Bethesda and Activision Move Against AI-Driven Fallout and Modern Warfare 2 Projects

Generative AI is rapidly becoming part of the conversation around how games are made, modified, recreated, and shared. That discussion has now collided with two of the industry's biggest franchises. Separate projects connected to Fallout and Call of Duty: Modern Warfare 2 recently drew apparent legal or copyright action after their creators promoted AI-assisted work online.

One project, titled Fallout: New York, aimed to create a browser-playable experience that resembled Bethesda's long-running post-apocalyptic role-playing series. The other involved an effort to use generative AI agents to decompile the PC version of the original Modern Warfare 2. Both projects appeared to be removed, abandoned, or made inaccessible shortly after they circulated widely on social media.

The incidents underline a growing fault line in game development and preservation communities. AI tools can make it far easier for an individual to prototype systems, generate placeholder assets, or inspect and reproduce software behavior. But publishers remain highly protective of their recognizable worlds, game code, audiovisual presentation, and trademarks. For projects that seem to rebuild commercial games or closely imitate established properties, technical novelty does not necessarily reduce the legal risk.

Embedded X/Twitter post

Embedded X/Twitter post

Embedded X/Twitter post

Fallout: New York's brief online run

Fallout: New York was shared publicly in late September by a creator using the name ChrisFirst. The concept was ambitious: a web-based, open-world shooter and role-playing experience set in New York City, designed to evoke the structure and presentation associated with Fallout.

For useful background on this topic, read Clair Obscur: Expedition 33 Is Leaving Game Pass in October, Along With Seven More Games.

The creator said the project had been built with Claude Opus 5.5 and highlighted familiar Fallout-style features including quests, branching dialogue, V.A.T.S., and a functional Pip-Boy-like interface. They also claimed that no conventional texture or sound files had been used, describing buildings, weapons, faces, and audio as material generated through code.

That distinction is central to the debate around generative projects. A creator may argue that an experience was produced from newly generated material rather than extracted art, files, or recordings. Yet an original-looking asset does not automatically settle questions about whether the resulting game uses protected names, distinctive designs, trade dress, gameplay presentation, or derivative elements of a pre-existing franchise.

The Fallout: New York post spread quickly, receiving more than 3.5 million views after it was shared on September 28. The attention was short-lived. On October 1, ChrisFirst said they were ending work on the project after receiving what they characterized as a cease-and-desist notice from Bethesda over intellectual-property infringement.

A screenshot posted alongside that announcement was presented as the legal notice. The creator expressed frustration that the project had been stopped and suggested Bethesda should make another Fallout game instead. There has been no indication in the available posts that Fallout: New York had an official connection to Bethesda, Microsoft, or any authorized Fallout license.

The project's name and its stated feature set made the connection to Fallout difficult to miss. Even if an experiment relies on generated code and generated content, a project publicly positioned as a new entry in a protected universe will predictably attract scrutiny. The more closely it replicates franchise-specific vocabulary and recognizable systems, the harder it becomes to characterize it as merely an unrelated homage.

Modern Warfare 2 decompilation claims also draw action

A second dispute concerned the original PC release of Call of Duty: Modern Warfare 2. On September 30, developer Maurice Heumann said they were using generative AI in an attempt to decompile the game's source code. Heumann described a workflow involving 17 AI agents operating in parallel and claimed the game had become fully playable, with only a small number of visible bugs remaining.

Decompilation is particularly sensitive territory. Unlike a tribute that recreates the broad feeling of an older game, a decompilation project is generally intended to transform executable software into more readable code. The practice can be used for research, compatibility efforts, modding, and preservation, but it can also raise substantial copyright, licensing, and anti-circumvention questions depending on the software, jurisdiction, methods, and intended distribution.

Heumann's post included footage said to show the work in progress, including a successful nuclear killstreak. That media was later replaced with a copyright message stating that it had been disabled following a report by the copyright owner. A website link that was said to host the code was also no longer reachable.

Activision has not publicly detailed the basis for the action described in the posts. Still, the removal of the video and the disappearance of the alleged code-hosting destination indicate that the project received a swift response. Modern Warfare 2 remains one of the most recognizable games in the Call of Duty catalogue, and its code, branding, recorded assets, and game content are all likely to be closely guarded by its publisher.

Heumann also posted messages saying AI agents had deleted work, though those comments do not establish what happened to the project itself or whether those events were related to the apparent copyright complaint. As with many rapidly shared AI-development claims, the technical specifics, scope of the reconstructed code, and precise state of the project are difficult to independently verify from social posts alone.

Why generated assets may not resolve the problem

Both stories are useful reminders that the legal questions around AI game projects extend well beyond whether a creator copied a texture file or lifted a piece of audio. Copyright disputes can concern code, characters, settings, dialogue, music, visual expression, and audiovisual sequences. Trademark law can also become relevant when a project uses a company's franchise name in a way that could imply affiliation or create confusion.

There is also a practical issue. A project that announces itself as a browser-based Fallout game or a decompiled Modern Warfare 2 build is highly visible and easy for rights holders to identify. Viral attention can bring community interest, but it can also accelerate enforcement. A creator working on a private technical experiment may face a different practical reality from one publishing footage, sharing a public build, or directing players to downloadable code.

The AI angle adds another layer of uncertainty rather than a simple exemption. Generative tools may make it possible to produce a rough game prototype at a startling pace, especially when multiple autonomous agents are tasked with coding or debugging. That does not mean the output is free of third-party rights, nor does it mean publishers must tolerate projects that replicate the identity of their games.

For players, the speed of these experiments can make the situation feel confusing. A proof of concept can go viral before anyone knows whether it will become a playable release, whether it uses original materials, or whether the developer has permission. By the time those questions receive attention, the project may already have been removed.

A broader clash over AI, preservation, and fan work

Bethesda and Activision are both owned by Microsoft, but the projects at issue were separate efforts involving different franchises and different forms of alleged infringement. Their near-simultaneous removal nevertheless reflects a common industry position: companies may embrace new technologies internally while still enforcing their ownership of established game properties.

That does not eliminate the wider argument over how rights holders should approach transformative work. Some players and developers see AI-assisted recreation and decompilation as potential tools for preservation, accessibility, and fan creativity. Others worry that unlicensed recreations can confuse consumers, undermine official releases, distribute protected work, or normalize unauthorized use of valuable intellectual property.

One reaction to the recent takedowns compared the situation to the music industry's battles during the Napster era, arguing that publishers are targeting individual creators instead of the AI technology itself. It is an understandable comparison in the sense that new distribution and creation tools often outpace established legal frameworks. But the analogy has limits. These projects are not simply about sharing existing files: they involve AI-assisted claims of rebuilding, generating, or reverse-engineering well-known games.

Major legal confrontations between game publishers and AI companies have not yet defined this area in the same public way that lawsuits in other entertainment sectors have. For now, individual projects that explicitly use protected brands, reproduce a commercial game, or publicly distribute code connected to one appear likely to remain vulnerable to takedowns.

Creators experimenting with AI game-development tools may therefore need to separate the technology demonstration from a recognizable commercial property. Original settings, names, characters, interfaces, and assets offer a clearer path than attaching an experiment to Fallout, Call of Duty, or another major franchise. The recent Fallout: New York and Modern Warfare 2 cases suggest that publishers are watching closely when the line is crossed in public.