GameStop remains an unstoppable retail force, as the juggernaut slammed cash register drawers shut with $1.83 billion in sales and $52.2 million in profit for the quarter ending October 31. The figures represent 8.2 and 11.8 percent increases, respectively, from the same quarter last year. The top five games during the quarter were Madden NFL 10, Halo 3: ODST, Batman: Arkham Asylum, NBA 2K10 and Wii Sports Resort, with all titles having "exceeded" the company's initial sales expectations. GameStop also revealed thar Modern Warfare 2 -- which released in Q4 on November 10 -- sold 2.5 million copies at the retailer in 72 hours. GameStop CEO Daniel DeMatteo is optimistic and believes MW2 is a bellwether for the rest of the holiday season.