Perhaps it didn't delete the games. It just deleted the connection to those games.
See if you can find the folder with those games.
Maybe you can remove them, then re-add them by copy/pasting or some such?
- Deadliest mass shooting by an individual in US history (10/01/2017)
- Deadliest high school shooting in US history (02/14/2018)
- Deadliest massacre of Jews in US history (10/27/2018)
- Political assassination attempt of TWO former presidents(and 10+ other people) (10/23/2018 - and beyond)