The Entertainment Software Rating Board (ESRB) is a self-regulatory organization that assigns age and content ratings, enforces industry-adopted advertising guidelines, and ensures responsible online privacy principles for computer and video games in the United States and Canada. The ESRB was established in 1994 by the Entertainment Software Association (formerly the Interactive Digital Software Association), in response to criticism of violent content found in video games such as Night Trap, Mortal Kombat, and other controversial video games portraying excessively violent or intense sexual situations.