This document provides an overview of what constitutes a video game and considerations for designing good games. It defines key elements of games as active participation, goals to achieve, and dynamic decision-making. Common game genres like arcade, puzzle, role-playing, and strategy games are described. Characteristics of good games are identified as challenging goals, interesting decisions with consequences, balanced gameplay, and rewarding players. Additional factors that enhance games are immersive storytelling, balanced characters, and appropriate music and effects.