Authors - Adin Nasywa Alifah, Puspita Kencana Sari Abstract - Metaverse gaming platforms like Minecraft and Roblox have evolved into important social spaces for Gen Z globally, including in Indonesia. These platforms are also emerging as high-risk environments for cybersecurity threats with implications for user security behavior and privacy protection. This study applies Protection Motivation Theory (PMT) to examine how self-efficacy and attitudes toward sharing personal information online predict phishing susceptibility among Indonesian Gen Z users. Using PLS-SEM on data from 200 users aged 18–28, results show that self-efficacy reduces phishing susceptibility both directly and indirectly through information-sharing attitudes, indicating partial mediation. These findings provide behavioral intelligence to support cybersecurity strategy, risk governance, and user privacy in emerging metaverse gaming ecosystems, particularly among Gen Z users.