Are video game companies using psychological manipulation to get their customers to buy more merchandise?

Perspective 1 [Medical/Psychological]: Validity of Video Game Addiction (Does Internet gaming Disorder exist? Can it be considered a real addiction/disorder?)

Perspective 2 [Social]: Effects that video game addiction has on consumers (stories of people who've suffered through or witnessed someone who's live was drastically impacted from video game addiction)

Perspective 3 [Economic]: Financial advantage that Video Game Companies get (How are they making their games addictive? Why do video game companies design their games to be addictive?)

Perspective 4:

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