Shares of IGT gained 59 cents, or 3.53 percent, to close at $17.30 on the New York Stock Exchange. In after hours trading, IGT shares rose 45 cents, or 2.60 percent, to $17.75.

Of particular concern to him was the placement of "Eddie Munster," a child vampire character, on the slot machine's glass. "That's something children can associate with," Siller said.