Cedega enables users to seamlessly play Windows games under Linux. With the help of Cedega, users do not need to run or even own a copy of Windows to play their favorite games. Cedega was formerly known as WineX.

Cedega (formerly known as WineX) is Trans Gaming Technologies' proprietary fork of Wine (from when the license of Wine wasn't the LGPL but the X11 license), which is designed specifically for running games written for Microsoft Windows under GNU/Linux. As such, its primary focus is implementing the Direct X API.