I also have a few games like that, but thankfully not so many, as previous to Steam, I didn’t buy a lot of games. (Which is also the heart of my problem - even when I didn’t buy a lot of games, I didn’t play/finish them all, but then started buying a lot of games, post-Steam.) These days I don’t dare buy games at all, and yet my backlog continues to fill up with freebees from various sources, many of which I would have bought… (Seeing unplayed games I had in my backlog being given away before I got around to playing them was quite effective in curing me of habit of buying games.)