Thanks, exactly what I’m talking about!
Yeah, it's pretty simple... the gaming audience & gaming development both moved on.
There are plenty of FPS story playthroughs... doesn't COD have a campaign mode released like every year? People have already named other things like Metro, Far Cry, Titanfall. But if you're saying no one specifically makes AAA dungeon/corridor single-player FPS games anymore... uh yeah. You're right. The market moved on from that a long time ago.
They don't really make one of my favorite games anymore either -- online, team-based, arena FPS, focus on map control, & large weapon selection focused on using "the right tool for the job", a la Unreal Tournament & Quake 3 -- but hey, that's life.