Abstract: Techniques are described that can that can modify content in a video game application executing on a game platform. The technique includes communicatively coupling with the game platform to exchange messages with the game platform. A tool may receive data representative of a version of a screen rendered by the game platform. The tool may then render its own version of the screen and modify the content data that comprises the screen image. The tool may then send a content modification message to the game platform, the message including data representative of the modifications made by the tool. The game platform may then modify and render a new version of the screen in the game platform based on the modification message.