---
title: "Activision and Bethesda Shut Down AI-Built Fallout and Call of Duty Projects"
description: "One project recreated Fallout in a browser; the other used 17 AI agents to decompile the original Modern Warfare 2 for PC."
author: "rews desk"
published: 2026-10-03T16:20:08Z
modified: 2026-10-03T21:00:27Z
url: https://rews.cc/a/activision-and-bethesda-shut-down-ai-built-fallout-and-call--45eaca
language: en
tags: ["ai", "gaming", "copyright", "openai", "automation", "tech"]
publisher: "Rews (https://rews.cc)"
---

# Activision and Bethesda Shut Down AI-Built Fallout and Call of Duty Projects

*One project recreated Fallout in a browser; the other used 17 AI agents to decompile the original Modern Warfare 2 for PC.*

By rews desk · October 3, 2026 · https://rews.cc/a/activision-and-bethesda-shut-down-ai-built-fallout-and-call--45eaca

## In brief

- Bethesda and Activision, both owned by Microsoft, shut down two fan projects built with generative AI this week
- Fallout: New York, a browser-playable AI recreation coded with Claude Opus 5.5, drew 3.5 million views before a cease and desist
- Maurice Heumann used 17 AI agents to decompile the original Modern Warfare 2 on PC until Activision had his footage removed
- Publishers have so far targeted individual projects rather than suing AI companies, unlike Hollywood studios

Bethesda and Activision, two Microsoft-owned game publishers, moved this week to shut down separate fan projects that used generative AI to recreate or reverse-engineer their games, as a wave of so-called vibe coding produces playable imitations of well-known titles.

The first project, called Fallout: New York, set out to rebuild the open-world shooter in New York City, playable in a browser. Its creator, who posts on X as ChrisFirst, said it was coded with Claude Opus 5.5 and contained no texture files and no sound files at all.

“Quests. Dialogue trees. V.A.T.S. A working Pip-Boy. Zero texture files. Zero sound files,” ChrisFirst wrote on Sept. 28. “Every building, weapon, face and sound is generated by code.”

The post drew more than 3.5 million views. Four days later, on Oct. 1, ChrisFirst said he was abandoning the project, posting a screenshot of what he described as a cease-and-desist letter from Bethesda accusing him of infringing its intellectual property.

“Hey, Bethesda Studios how about you make a Fallout game instead so I don’t have to?” he wrote. “Sorry to everyone who enjoyed the game! But the suits got involved and the fun is over.”

The second project took aim at Call of Duty. Maurice Heumann said on X on Wednesday that he was using generative AI to decompile the source code of the original Modern Warfare 2 on PC, with what he described as 17 AI agents working on it at once.

“The game is fully playable now and almost all visible bugs are gone,” he wrote. “Only a few are left. I even managed to get my first nuke.”

The footage he posted with the message, including an apparent clip of the killstreak, was soon removed at Activision’s request. In its place appeared a notice: “This media has been disabled in response to a report by the copyright owner.” A link to a site that had allegedly hosted the code no longer works. Activision and Bethesda did not comment publicly on either action.

Mr. Heumann’s week had other problems. His more recent posts complain that his own AI agents deleted his files. “The fuckers did it again,” he wrote last weekend.

The takedowns land in the middle of a free-for-all in which hobbyists use AI tools to produce knockoffs and decompilations of existing games, some of which go viral within days. The big publishers have so far gone after individual projects rather than the AI companies themselves, a contrast with Hollywood studios, which have sued AI firms directly.

That choice drew mockery after the latest notices. “Going after the little guys instead of the technology, this is Napster and music industry 2.0, we’re already saw how this plays out, we win they lose,” one person wrote in response to the takedowns.