In a medium skillet over medium heat, brown the ground beef and drain fat. Add the diced tomatoes with green chile peppers, water, sour cream and taco seasoning mix. Let simmer for 5 to 10 minutes.
In the bottom of a 9x13 inch baking dish, place a layer of tortilla chips. Cover with a layer of the meat mixture then a layer of cheese. Repeat this process until the last layer is cheese.
Bake in the preheated oven for 20 minutes, or until the cheese is bubbly.
