Game file used by Crazy Machines, a physics-based puzzle game; saves an experiment, which is a game level that contains objects and contraptions; used for storing custom experiments. Crazy Machines saves experiments within "labs." A user lab called "My Lab" can be used for saving custom experiments. Users can export each My Lab experiment to a CME file, and they can import downloaded CME files into the lab. By default, CME files are saved to the following directory of the Crazy Experiments installation: \data\experiments\.