Preheat oven to 275 F. Lightly spray 2 large rimmed baking sheets with nonstick spray.
In a medium saucepan over medium high heat, mix together butter, curry powder, Worcestershire sauce, garlic salt, cayenne pepper, maple syrup and raisins. Heat mixture, stirring constantly, until bubbles begin to form around edges and remove from heat. In a large bowl, toss together chips, cereal, crackers, pretzels, nuts and popped popcorn. Drizzle mixture with butter and toss gently to coat. Spread across baking sheets and bake in the preheated oven 45 minutes stirring every 10 minutes, or until crisp and lightly browned.