Combos attacks in the game Beat 'em up refers to rapid combinations of basic attacks .
Perry , Douglass C. , Teenage Mutant Ninja Turtles 1989 Arcade Review , IGN , Mar 14 , 2007 , Accessed Mar 22 , 2009 Attacks can include rapid combinations of basic attacks ( combos ) as well as jumping and grappling attacks .
Beat 'em up