It depends on the game developer if they make this information public or not.Even on app store or google play you often see details like "various improvements" which tells you nothing.
To ensure that you receive hot fixes, make sure that your system is connected to the internet when Borderlands 2 boots up.
This issue can be exacerbated by anti-virus/internet security applications blocking Steam from doing what it wants to and reading all of Steam's files as the Steam application attempts to verify them.
Try adding exceptions in these applications for your Steam folder and restart Steam to see if this resolves your issue.
* Yug Ylimaf * Wharf Horse * Hayley Smith, Seal Team Six * Roswell that Ends Well * Smoking and the Bandit In addition to the new chapters, a new difficulty level will be available on ALL levels known as "Onyx" difficulty.
(https://media.giphy.com/media/x UPGcmxzp R86REg KTm/giphy.gif) Animation Throwdown will have FIVE new Adventure chapters added to the game - one for each show.
I have automatic game updates enabled on Steam, but so far I haven't been able to find an easy way to see exactly what has been updated.