To install Flash Player v9.0.246:
Replaced the Debug and Release versions of browser plugins and standalone players
Adobe Flash Player was a critical security update released by Adobe on August 4, 2009 . It was specifically designed to resolve multiple high-risk vulnerabilities (such as memory corruption) that could allow attackers to take control of a user's system. Core Status & Support
Use Ruffle, an open-source Flash Player emulator that runs in modern browsers without the security risks of the original plugin.
Sites like the Flashpoint Archive or The Internet Archive provide sandboxed environments to play thousands of archived Flash games and animations.