Preheat the oven to 375°F. Brown the ground beef in a large skillet over medium heat, breaking it up as it cooks.
Stir in the taco seasoning mix and cook for 2 more minutes. Remove the skillet from the heat.
Spread the refried beans in an even layer across the bottom of a 9x9 inch baking dish.
Spoon the seasoned beef over the beans, then pour the salsa on top and spread it gently.
Sprinkle 1 1/2 cups of the shredded cheese over the salsa layer.
Bake for 15 minutes until the cheese is melted and the edges bubble.
Remove the dish from the oven and arrange the tortilla chips upright across the top to resemble gravestones.
Scatter the remaining 1/2 cup cheese over the chips and return the dish to the oven for 5 minutes.
Let the casserole rest for 5 minutes, then add dollops of sour cream and sprinkle with chopped cilantro before serving.