For me it’s Deus Ex Mankind Divided. I played the original when it was new but barely remember it and I owned shadow war and never got into it.
However Human revolution blew me away. I loved that game so much. I still think about it and actually am making this post because I finally started cyberpunk last night and got human revolution vibes like crazy.
However I bought mankind divided on my birthday when it released. Happened to be right around the same day. I turned it on, walked a few steps and turned it off. For whatever reason I’ve never turned it on again.
Yakuza series -- I own almost every game now because of sales and Humble Bundle monthly/choice. I feel overwhelmed by the huge time commitment to play all the games, so maybe that’s why I usually stop playing after an hour or two of Yakuza 0.
Skyrim -- I still haven’t finished Oblivion with all the expansions, so I keep putting Skyrim off. I also need to finish Fallout 4 too.
Shogun Total War II -- I loved the first Shogun but I don’t know why I haven’t played the sequel even though I’ve owned it for years.
GTA5 -- loved every GTA before it, but for some reason whenever I start the game up, I just turn it off after driving for a little while. Maybe I’m burnt out on the game’s formula now?
Nier: Automata -- I keep hearing how awesome this game is, but maybe the hype is making me delay playing the game as I fear that it won’t live up to the hype.
Master of Orion 1 /2 and Master of Magic -- I loved Civilization 1 to 3, but I grew up reading sci-fi and fantasy so I really want to like MOO and MOM but maybe it’s time to accept the fact I’ll never really play them. These games are really old now. I still own the original boxes and floppies for these games (although I have digital versions now).