Coarsely chop the onion
Cut the cream cheese into small pieces
Spray the slow cooker bowl with cooking spray
Combine the uncooked meat, soup, onion, Worcestershire sauce, garlic powder, and water in the slow cooker bowl
Cook on low for 8 hours
20 minutes before serving, add the cream cheese to the slow cooker contents
Stir occasionally until the mixture is combined
10 minutes before serving, add the noodles to the mixture
Stir until noodles are combined with the mixture
Continue cooking for at least 10 minutes
Serve