Scary? hardly

I recently bought a shit ton of old and new horror video games and played them. It was fun but all the scares fell flat and I did not feel any sense of fear or anxiety which I'm pretty sure should come from playing them. I played games like Dead space, FEAR, Silent hill, and some indies by myself in the dark but I didn't feel anything. Am I doing it wrong or am I just emotionless?

If you were emotionless, you would probably be a sociopath or at least not right in the head (no offense intended).

I too played a lot of horror games (the entire F.E.A.R. series, Silent Hill, Dead Space, Jericho and Undying, many Resident Evil games, and so on), and honestly the jumpscares caught me every time during the first playthrough. That said, when you replay the game and know when the scary chord or boogeyman will sound/appear, then you're less likely to get scared since you already know what to expect. That's just how I went through most horror games of course, certain parts of certain games were unnerving at best even after several playthroughs (the locker rooms and the basement of Wade Elementary in F.E.A.R. 2, or the Creep in F.3.A.R., dammit).

You're probably just desensationalized. You're playing horror games all the time that you expect to be scared but the more you expect something scary to happen, the less likely you are going to be scared because you anticipate the adrenaline rush. Things gotta come out naturally, stay off the horror games for awhile or find one that sends a subtle scary kind-of-sense, like not a jump scare but more of the 'realization' scary

times change and people evolve.