This document discusses key concepts for studying video games, including why they should be studied, who studies them, and different types of analysis. It introduces the concepts of frames and boundaries, the magic circle, and lusory attitude. Regarding frames and boundaries, it explains that every game exists within a frame that communicates it is a game and marks off the space and time of play. The magic circle refers to the special space and time created by a game that establishes an alternate reality governed by its rules. Lusory attitude describes the psychological attitude of faith and social contract required of players to enter into a game.