The Qt toolkit offers a huge amount of cross-platform functionality. Qt can be used in a lot of different ways for game programming, from quickly creating throw-away external debug tools to providing core game infrastructure. This talk will highlight different ways that Qt can make the lives of game developers easier. Qt contains a huge number of well-tested and cross-platform modules that can be used for game development purposes. Of course, Qt is great for creating level editors and other tools with a nice cross-platform GUI. But Qt can also be helpful in building the game itself, even when the Qt GUI parts are not used. The QObject system provides ways to give generic access to properties and methods of C++ objects. This can be used for introspection and live manipulation of game objects. With the generic QVariant data type it is easy to make game objects serializable and to give scripting languages like JavaScript access to the game. Other useful parts are the multithreading support, the QML markup language and OpenGL integration. This talk gives an overview of these different techniques and also discusses issues like performance, memory management, ways of implementing the game loop and integrating various render engines like OSG or Ogre3D.