The success of the game led to a sequel , '' Halo 2 '' , which was announced on August 8 , 2002 , at Microsoft 's New York City X02 press event . It featured improved graphics , new weapons , and a multiplayer mode on Xbox Live . '' Halo 3 '' was announced at the 2006 Electronic Entertainment Expo . The initial conception for the third game was done before '' Halo 2 '' was released in 2004 . It utilized a proprietary , in-house graphics engine , and employed advanced graphics technologies
X02
X (Xbox show)
Halo (franchise)