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The VGChartz Network is a network of five video game websites - VGChartz, gamrFeed, gamrReview, gamrTV and gamrConnect. VGChartz itself sits at the centre of the VGChartz Network and is a video game sales tracking website that provides weekly sales figures of console software and hardware by region. The site was launched in June 2005 and is owned by Brett Walton. Employing ten people, VGChartz provides tools for worldwide data analysis and regular worldwide written analysis of the data it provides. VGChartz provides tools for data analysis and charting and regular written analysis of the data referencing major news in the video gaming industry. Sales figures on VGChartz are based on estimates extrapolated from small retail samples. While offering some information about their methodology through their website, VGChartz does not publish any sources on how they get their data. Some sites, including Gamasutra and ''Wired News'', have questioned the reliability of the information presented by the site.〔 VGChartz has defended the credibility and reliability of its sales data, often comparing their numbers with the ones published by NPD Group, although some charts have been retroactively adjusted to better match NPD's monthly reports.〔 ==History== VGChartz began in June 2005 when Brett Walton created an area on everythingandnothing.org.uk (as the site he had created at the time) called "videogame sales charts" which collected publicly available video game sales data in one place for users to view. In July 2006, Brett launched VGCharts.org, a stand-alone version of the sub-site on everythingandnothing and still collecting publicly available data together from across the web. In March 2007, Brett bought the VGChartz.com domain and rebranded the site as VGChartz. With this re-launch came the move from collecting publicly available data to carrying out original research on the videogame market, and VGChartz began to produce its own weekly charts. In June 2008 Robert Pasarella wrote an article comparing VGChartz and NPD services, advantages and disadvantages, VGChartz being the winner due to the modality on their service.〔(Data on the Web: VGChartz vs. NPD - O'Reilly Radar )〕 However, in the same month Simon Carless wrote an article in which he criticized VG Chartz for the poor tracking of a video game Iron Man in comparison to NPD, for adjusting data to match other sales tracking firms in certain cases, and for making educated guesses for some figures data for other regions.〔 Brett argued against the claims made by Simon, indicating that he had cherry-picked certain pieces of data to present VGChartz in a bad light rather than present a fair evaluation of the data.〔 With the launch of PlayStation Move and Kinect towards the end of 2010, renewed interest in the videogame market led VGChartz to report estimates for initial sales of both pieces of hardware. Aaron Greenberg, Microsoft Chief of Staff for Interactive Entertainment Business openly criticized VGChartz data for Kinect on his Twitter feed, later adding "Sorry if my note offended". The comments from Greenberg prompted Walton to write an editorial "Why it is so Easy to Blame VGChartz" in which he addressed why media organisations and publishers try to undermine the data and methods on the site. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「VG Chartz」の詳細全文を読む スポンサード リンク
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