Angry Birds (video game) featured app on the UK App Store in February 2010 and quickly reached No.1 there, it reached the No. 1 spot on the paid apps chart in the US App Store in the middle of 2010 and then stayed there for 275 days. The initial cost to develop "Angry Birds" was estimated to exceed €100,000, not including costs for the subsequent updates. For the iOS version, Rovio partnered with distributor Chillingo to publish the game to the App Store. Chillingo claimed to have participated in final game polishing, such as adding visible trajectory lines, pinch to zoom, pigs' grunts, birds'
Angry Birds for analysis". In a statement to the press, Rovio denied that they were providing any information to the intelligence agencies, but did not exclude the possibility that their advertisers might do so. Following this revelation, on 29 January, the Angry Birds site was defaced by hackers who replaced it with "Spying Birds" via a DNS hijacking attack. According to Rovio, "The defacement was caught in minutes and corrected immediately". The Syrian Electronic Army tweeted after the incident that the attack had been carried out by "a friend" of theirs. Angry Birds Angry Birds is a video game franchise created by