Astro Boy: Omega Factor was developed by Treasure and Hitmaker, and published by Sega for the Game Boy Advance in 2004. This action-packed game is based on Osamu Tezuka's Astro Boy franchise, blending platforming stages with side-scrolling shooting levels. Players take control of Astro Boy, utilizing his robot abilities and powerful attacks to defeat enemies and bosses. The game includes various characters from the Astro Boy series and other works by Tezuka. Its unique blend of genres and compelling narrative, along with its robust upgrade system, make it one of the standout titles for the GBA.