Doom CAPTCHA is an innovative project that transforms traditional CAPTCHA challenges into a first-person shooter experience using the classic game Doom. Developed by Guillermo Rauch, CEO of Vercel, this new CAPTCHA requires users to prove they are human by killing at least three enemies in nightmare mode. Players control a space marine and use arrow keys and the space bar to navigate through the game while battling formidable demons. Although the mechanics are simple, mastering the gameplay, especially in nightmare mode, can be quite challenging, leading some users to devise specific strategies to succeed. The choice of Doom stems from its status as an iconic game with a history of creative adaptations by developers. The project reflects an ongoing trend in tech circles to leverage Doom in new and unusual contexts. Rauch has hinted at potential updates to increase the difficulty of the game as users quickly learn how to excel at the challenge.

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