This information will go into the "comments" section of each game page. This will require a simple spreadsheet (I suggest Google Sheets so you can share your work as read-only for others to help validate it!) with 2 columns: the game ID number, and a proper comment exactly as it should appear in the game page.
Alternatively it doesn't really need to be a spreadsheet, it can be a simple text file (one line per entry) using a special character as column separator such as "|".
For instance, this is the link for game Mikie:
https://spectrumcomputing.co.uk/forums/ ... =32&t=2669
Therefore Mikie's ID is 2669. It plays "A Hard Day's Night", so a proper entry could be:
2669|Music: "A Hard Day's Night" by The Beatles.
Feel free to add extra columns to help you keep track of content (for instance game title). I will simply ignore them. For instance:
2669|Music: "A Hard Day's Night" by The Beatles.|Mikie (Joffa's)
You can write the comment in any way you find appropriate. Although I suggest starting all comments in the same way (for instance "Music:") so people will be able to easily search for these comments later.