Astro Boy: Omega Factor, released in Japan as Astro Boy: Tetsuwan Atom (アストロボーイ・鉄腕アトム) is a beat 'em up video game developed by Treasure and Hitmaker, and published by Sega. The game was released for the Game Boy Advance on December 18, 2003 in Japan; August 18, 2004 in North America; and February 18, 2005 in Europe. The game is based on Osamu Tezuka's manga and anime franchise Astro Boy. However, it also features characters and plotlines from the artist's entire canon of work.