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.
It’s relatively short, but visually stunning and the gameplay is fluid. Mirror’s Edge (the first one) has a spot in my heart.