Here is the full list of all 14 Costa's Classic Cosmic Pizzas achievements.
Completed the boss level of chapter 1
Completed the boss level of chapter 2
Completed the boss level of chapter 3
Solve the toughest lab puzzle.
Survive the toughest death course.
Deliver 1 pizza in Free Delivery Mode.
Deliver 5 pizzas in Free Delivery Mode.
Deliver 20 pizzas in Free Delivery Mode.
Collected all helmets
Bought all organs