This document discusses motivations for playing video games. It begins by providing historical context of early video games from the 1970s to recent years. It then explores theories of play, noting that play is intrinsically motivated and a source of enjoyment. Several intrinsic motivations for playing video games are examined, including curiosity and a desire for mastery through exploration and problem-solving. Neurological rewards from learning are also discussed. The document then analyzes behavioral game mechanics and how they engage players through challenges, feedback, goals, and social elements. It proposes that games satisfy various human needs and motivations according to self-determination theory and Maslow's hierarchy of needs.