Some games can teach beneficial lessons to the player. These games can be instructional by design to teach a lesson in history or another school topic; this has been called educational software or edutainment. Other games simply involve real-world topics or scientific principles, where the player learns about those by playing it. Video games have attracted controversies due to how they are produced, their content and how they are played. Many games feature violent content, which may lead to the player becoming desensitized to violence. Some have linked playing video games to violent acts and other antisocial behavior.
