writes "In an opinion piece, casual game publisher WildTangent's CEO Alex St. John (himself a Microsoft veteran and one of the DirectX creators) has sharply criticized some of Windows Vista's features as they related to video game creation, noting: "We have found many of the security changes planned for Vista alarming and likely to present sweeping challenges for PC gaming, especially for online distributed games. The central change that impacts all downloadable applications in Vista is the introduction of Limited User Accounts. LUA's can already be found in Windows XP, but nobody uses them because of the onerous restrictions they place on usability. In Vista, LUA's are mandatory and inescapable. Although Microsoft made some effort to soften the obstructions LUA's place in the path of installing software in Vista, they still present a tremendous obstacle to downloadable game distribution and game compatibility with Vista in general.""