Segagaga (セガガガ, stylized SGGG) is a role-playing video game developed by Tez Okano of Sega and released solely in Japan for the Sega Dreamcast on March 29, 2001, towards the end of the console’s lifespan.

Segagaga’s storyline makes tongue-in-cheek references to the commercially unsuccessful Dreamcast console – the player is recruited by Sega in a last-ditch effort to stop a rival company from taking over the console market. The game, interspersed with animated cut scenes, features numerous cameos by Sega characters and games, as well as a variety of gameplay styles.