work on improving the discovery process for users, taking principles they learned in providing transparency for matchmaking in Dota 2 to make the process better, and using that towards Steam storefront procedures to help refine their algorithms with user feedback. Valve has full authority to remove games from the service for various reasons; however games that are removed can still be downloaded and played by those that have already purchased these games. Another reason would be games that have had their licenses expired may no longer be sold, such as when a number of Transformers games published by Activision under license from Hasbro were removed from the store in January 2018. Grand Theft Auto: Vice City was removed from Steam in 2012 because of a claim from the Recording Industry Association of America over an expired license for one of the songs on the soundtrack. Around the launch of Electronic Arts' (EA) own digital storefront Origin during the same year, Valve removed Crysis 2, Dragon Age II, and Alice: Madness Returns from Steam because the terms of service prevented games from having their own in-game storefront for downloadable content. In the case of Crysis 2, a "Maximum Edition" that contained all the available downloadable content for the game and removed the in-game storefront was re-added to Steam. Valve also remove games that are formally stated to be violating copyright or other intellectual property when given such complaints. In 2016, Valve removed Orion by Trek Industries when Activision filed a Digital Millennium Copyright Act (DMCA) complaint about the game after it was discovered that one of the game's artists had taken, among other assets, gun models directly from Call of Duty: Black Ops 3 and Call of Duty: Advanced Warfare. Quality control With the launch of Steam Direct, effectively removing any curation of games by Valve prior to being published on Steam, there have been several incidents of published games that have attempted to mislead Steam users. Starting in June 2018, Valve has taken actions against games and developers that are "trolling" the system; in September 2018, Valve explicitly defined that trolls on Steam "aren't actually interested in good faith efforts to make and sell games to you or anyone" and instead use "game shaped object" that could be considered a video game but would not be considered "good" by a near-unanimity of users. As an example, Valve's Lombardi stated that