A universal peer-to-peer game download for future proof gaming machines and legacy gaming machines, not requiring a central server for downloading. A peer-to-peer network of gaming machines includes a network; a first gaming machine including a first locked enclosure, a first computing device disposed within the first locked enclosure for controlling game play on the first gaming machine, a first download-enabled computing device that is configured to be selectively coupled to the network and disposed within the first locked enclosure, and a second gaming machine. The first download enabled computing device is configured to couple to the second gaming machine over the network and to download a package authenticated by a certificate directly from the second gaming machine, the package including software components to be installed and executed on the first computing device.