: The article "Video Game Piracy as Viral Vector and National Security Threat" by Andrew Moshirnia discusses the "Kenzero" Trojan that was bundled with pirated copies of Cross Days . The paper details how the malware collected personal data, browser history, and screenshots of users attempting to download the game for free, eventually posting the info publicly on a blog.
If you are searching for a technical paper in a different field, "cross day" is also a common term in: Cross Days Free Download
: A master's thesis titled "User and media perception on game design anti-piracy measures" by researchers at Uppsala University analyzes Cross Days as a primary case study. It examines the public's reaction to the game’s controversial "endogenous DRM," which functioned more like malware than traditional protection. : The article "Video Game Piracy as Viral