Steam has added a cloud note-taking application feature that supports offline use.
It allows you to record notes related to the game you are playing. This feature has rich text formatting options, and multiple notes can be recorded for each game, even in offline mode.
The notes will be saved according to the game and will be synchronized to other PCs you are logged into. In addition to the Steam interface in the game, they can also be seen on the game details page.
So playing games can be more serious than studying!