Onslaught is a video game that was released by Hewson in 1989 for the Amiga and subsequently ported to the Atari ST, PC and Sega Mega Drive. The game is a fantasy platform beat'em up featuring an eerie soundtrack and graphic violence, with strong imagery of blood, gore and warfare. Onslaught was re-released for the iPhone OS in December 2008 and for the Xbox 360 in January 2009 as part of the Xbox Live Community Games service.