Infinity Ward’s Call Of Duty: Modern Warfare 2 ended up as the most pirated game via BitTorrent in 2009, according to media reports, with 4.1 million unauthorized downloads of the PC version alone. A report from BitTorrent-related site TorrentFreak compiled its own estimates from several sources, including reports from all public BitTorrent trackers. Due to its distributed nature, with peers seeding data to each other, BitTorrent sites have proved relatively difficult to stamp out as …