Are there alot of games developed for Tech geeks over 40 years old.

Though I'm a woman, I am around your age and a gamer nerd and I really enjoy "The Climb" - for exercise, to enjoy the scenery, and to face my mild fear of heights. Kids could play it just fine, but it's not a child-focused game. And, until you master the half-grip to hold with one hand, it can be quite challenging.

Skyrim, Elite Dangerous, and SuperHot all feel adult-focused to me too and are all really enjoyable and deep.