Confirming an earlier ESRB listing, Sierra Online has announced a sequel to its popular top-down arcade shooter, Assault Heroes. Promising to "expand its horizons into outer space," Assault Heroes 2 will feature cooperative gameplay, hi-jackable enemy vehicles and, by the looks of things, at least one robot mammoth. We rather like those.

Developed by Wanako Studios, Assault Heroes 2 is scheduled to arrive on Xbox Live Arcade this Spring. Be sure to check out IGN's preview for further details.

This article was originally published on Joystiq.

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