Single player FPS

In 1997 I played GoldenEye on N64

I guess that was the first and last FPS that I saw/played... Until Infinite Tanks, which I love but is getting a bit boring. 

Tonight I watched a shot ton of YouTube videos highlighting the best of FPS/single player games.

I ended up buying METRO last light, and am also interested in another one based on Germany vs USSR in Stalingrad... But for now....