Guillermo Rauch, CEO of Vercel, has introduced a novel DOOM-themed CAPTCHA that requires users to engage in the iconic game and defeat at least three monsters to verify their humanity. This innovative twist on traditional CAPTCHA formats has gained significant attention on Hacker News, where developers are sharing mixed reactions about its difficulty. While some users find the challenge overwhelming, others appreciate the unique and nostalgic gaming experience it offers. This creative approach underscores the evolving landscape of online security measures.