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.