cs.rin.ru (often referred to simply as "CS RIN" or "RIN") is a long-standing, prominent online forum and community focused on the technical aspects of video games, particularly in the areas of game cracking, piracy, and digital rights management (DRM) circumvention.

It remains one of the oldest and most respected (within the piracy/cracking subculture) sources for high-quality, up-to-date information on game protection and circumvention, operating since 2004.