terrifyingly realistic". Destructoid shared this view, saying the support group campaign is "a clever marketing tool", but wishing it existed as "we all know there really are people who suffer from one-more-turn-itis". VantureBeat said the campaign was "incredibly clever and funny", adding "what made it so powerful was not the near-flawless execution and fine detail; it was the fact that it could have been real". 'Ctrl-Alt-Play: Essays on Control in Video Gaming' noted the spoof highlighted the series' "hyper-addictive turn-based gameplay". As part of the Civilization V version of the campaign, 2K Games asked Civilization addicts to submit stories via video in order to win $2,500 and a "framed, limited edition Civilization Anonymous poster signed by Firaxis Games". The 2010 version was "updated for modern concerns, like the franchise's broader audience and iPhone editions of the game acting as a gateway drug." Release Civilization IV was published for the Windows and Mac OS X platforms. Aspyr released the Mac OS X version in June 2006, and a Mac digital version was released January 2010 on gameagent.com. Users who quickly purchased the game after initial release reported having problems playing the game on particular sets of video drivers, which were later resolved by a Firaxis patch, according to GameSpy. By the end of March 2008, the game sold over three million units. Firaxis Games has also published two expansion packs for Civilization IV, entitled Civilization IV: Warlords and Civilization IV: Beyond the Sword. A remake of the original 1994 Sid Meier's Colonization, rebuilt with Civilization IV'''s game engine and titled Civilization IV: Colonization, was released for Mac and PC as a standalone game and later bundled with the two expansions as Civilization IV: The Complete Edition. Reception SalesCivilization IV was a commercial success, and sold more than 1 million units by mid-March 2006. By that time, it had held a top-10 position on every weekly computer game sales chart released by The NPD Group since the game's launch. NPD declared Civilization IV the 11th-best-selling computer game of 2005, and it rose to ninth place on the firm's annual computer game sales chart for the following year. It returned to NPD's year-end top 20 in 2008 with a 13th-place finish. The game also received a "Silver" sales award from the Entertainment and Leisure Software Publishers Association (ELSPA), indicating sales of at least 100,000 copies in the United Kingdom. According to Take-Two Interactive,