https://steamdb.info/blog/recent-package-name-additions/

This is a megaton. Biggest leak we've ever had. As always, it's genuine but not set in stone, so keep that in mind when reading through the list. We've had entries show up for Ever17 and Halo 3 before, but never saw a release because of changes in development. Some ports do get cancelled. Here's what's been uncovered so far. Will make edits if any others are found.