This is not for games; it is for restoration. If your Lumia lost its "Extras & Info" or "Motion Data" app, this archive contains original Nokia/Microsoft signed XAPs. These are hardware-specific and usually cannot be installed on unlocked devices without JTAG.
The tool will automatically detect your phone model and OS version. windows phone xap archive
Think of a XAP file as the equivalent of an Android .apk or an iOS .ipa . It's a digitally-signed compressed archive (a .zip file) that contains everything an application needs to run. Specifically, a XAP file typically contains: This is not for games; it is for restoration