Someone made a CAPTCHA where you play Doom on Nightmare difficulty
Briefly

Rauch's latest CAPTCHA game, inspired by Doom, showcases the capabilities of Vercel's v0 tool. However, its security and legal status are questionable.
In 2021, Miquel Camps Orteza created a similar CAPTCHA, but it only loosely resembled Doom and was made for entertainment rather than security.
While Rauch's rendition closely mimics Doom's style, it remains more of a playful experiment than a viable security solution, highlighting its lack of legal clarity.
Doom's source code is open source, but the game's assets are not, which raises concerns about using them in web applications.
Read at Ars Technica
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