Brown the lean ground round beef in a large pot or Dutch oven.

Drain the beef and rinse with hot water to remove excess grease.

Add the browned beef back to the pot.

Add the chopped onion, chopped green chiles, taco seasoning, Ranch dressing mix, corn (with juice), crushed tomatoes, pinto beans with juice, and water to the pot.

Bring the mixture to a boil.

Reduce heat, cover the pot, and simmer for 1 hour, stirring occasionally to prevent sticking.

Serve hot with tortilla chips.