As a result , analysts lowered their expectations for future music games ; for example , projections of first quarter U.S. sales of DJ Hero , a Guitar Hero `` spin-off '' , were reduced from 1.6 million units to only 600,000 .
As a result , analysts have lowered expectations for future music games ; projections for sales of DJ Hero , a spinoff of Guitar Hero published by Activision , have been reduced from 1.6 million units in the first quarter of sales in the United Sates to only 600,000 .