Not everything has been documented, as the filenames are encrypted. Some significant games known include almost every Angry Birds game, Bloons Tower Defense 5, Club Penguin, and Roblox.

Archive.org links to the leaked files are here:
https://web.archive.org/web/*/https://d193ln56du8muy.cloudfront.net/ipas/*
https://web.archive.org/web/*/https://d3qktfj96j46kx.cloudfront.net/*
https://web.archive.org/web/*/https://builds.testflightapp.com.s3.amazonaws.com/*
You can download them for yourself to help document which files contain which apps. You will need a jailbroken iPhone/iPad on iOS 10 or lower to install and play them, as they are mostly 32-bit apps.

Important edit now that the story has progressed:

As the post is now very outdated I figure I should update it to prevent spreading any misinformation. First, all the files on archive.org have been removed, due to a DMCA request from Apple themselves. Do not try to reupload any files to archive.org. Second as the Angry Birds community doesn't wish to be the center for this information, a standalone server was created. You can find it here: https://discord.com/invite/NMGYQy3teZ

Most interesting findings have been backed up to torrents and Google Drive folders which can be found there.