In a large mixing bowl, add the chicken, 1 cup of cheese, soup, half & half, sour cream, chiles, and taco seasoning. Stir together until everything's evenly combined.
Spray a 9x13" baking dish with non-stick cooking spray. Spread half of the crushed chips evenly out over the bottom of the dish.
Add half of the chicken mixture, in dollops, evenly out over the chips. Use the back of a spoon the gently spread the mixture out evenly. Repeat the layers.
Sprinkle the last 1/2 cup of cheese evenly out over the top of the casserole.
Tightly cover the casserole with aluminum foil. Bake at 350 degrees for 30-32 minutes, or until hot & bubbly.
Remove the foil, let the casserole rest for 2 minutes, and serve