The twenty-second chapter, “Laws, licenses, marketing, and selling,” attempts to provide the user with the tools they will need to protect themselves legally. It discusses topics ranging from why a user might want to see a lawyer to how to market their engine, piracy, how to price their games, some specific marketing techniques, handling customer interaction, and includes an interview with Ivan Ertlov. Ivan Ertlov is the most successful GameGuru maker in terms of critical acclaim and sales to date.