ADP files that are used with Microsoft Access can, of course, be opened with the program, too, but only if you're running a version older than Access 2013; they also don't work with SQL Server 2012 or newer. We're not aware of a media player or other tool that can open ADP files that are ripped (copied) from video game discs, nor do we have a download link for an ADP video player. Video files in the ADP format are usually downloaded from browser add-ons like Video DownloadHelper in Firefox. To learn more, check out our full review of Video DownloadHelper. If you find that an application on your PC does try to open the ADP file but it's the wrong application or if you would rather have another installed program open ADP files, see our How to Change the Default Program for a Specific File Extension guide for making that change in Windows.