I made this after noticing that the original meme had an arm that doesn't match to any of the people in the crowd.
Notice this row has three hands up, unlike the other rows of hands, but still only two people.
If the further person happened to be raising both of their arms, it still doesn't work, because they would have to be wearing a shirt with different sleeve lengths. And it can't be the closer person, because they'd have arms with two different skin tones.
I've started to use Playnite. It's nice to have a complete catelog of all my games. Most of my real games (ie ignoring random freebies) are on steam, but I've collected a bunch elsewhere like gog, epic, humble bundle, and others. You can give it credentials and set up nearly all the major catelogs so that it can generate a listing of all games you own.
I use it to mark when I completed a game, but I've only had it for a couple years, so I generally go by memory or by steam statistics of hours played.
Downside is that it's Windows only. It's open source and free, and I still have a windows machine for most of my gpu games, but I mainly game on my steam deck or my Linux laptop these days, so I need to find another option or see if Playnite is wine/Proton compatible.