Im an amateur at Google Sheets/Excel, but I created a spreadsheet that you can copy and edit for yourself to make it easier to figure out which game trophies you still need. You can do anything you want to your own copy, mine is basically a template for you to edit yourself. This is for all the users that still play the flash games on Neopets. I found a way to play the flash games and it is easy. (MODS- please delete this part if not allowed) I downloaded a flash playing browser called "Pale Moon", and the latest working version of Flash. I am going to attach a small screenshot of my spreadsheet. Any questions, feel free to ask.
Here is the link to the spreadsheet: