A tabletop role-playing game (typically abbreviated as TRPG or TTRPG), also known as a pen-and-paper role-playing game, is a classification for a role-playing game (RPG) in which the participants describe their characters' actions through speech. Participants determine the actions of their characters based on their characterization, and the actions succeed or fail according to a set formal system of rules and guidelines. Within the rules, players have the freedom to improvise; their choices shape the direction and outcome of the game. The terms pen-and-paper and tabletop are generally only used to distinguish this format of RPG from other formats, since neither pen and paper nor a table are strictly necessary. Gameplay Overview In most games, a specially designated player typically called the game master (GM) purchases or prepares a set of rules and a fictional setting in which each player acts out the role of a single character. The GM describes the game world and its inhabitants; the other players describe the intended actions of their characters, and the GM describes the outcomes. Some outcomes are determined by the game system, and some are chosen by the GM. This pattern was established by the first published role-playing game, Dungeons & Dragons, but is not universal across all tabletop RPGs. Detail Games are of indefinite length, from a single brief session (usually completed in a few hours) to a series of repeated sessions that may continue for years with an evolving cast of players and characters. Play is often episodic and mission-centric, with a series of challenges culminating in a final puzzle or enemy that must be overcome. Multiple missions played with the same characters may be related to each other in a plot arc of escalating challenges. The exact tone, structure, pace and end (if any) vary from game to game depending on the needs and preferences of the players. During the first session, players typically create characters whose roles they will play in the game. As well as fleshing out the character's personal history and background, they assign numerical statistics to the character; these will be used later to determine the outcome of events in the game. Together, these notes tell the player about their character and said character's place in the game world. In many game systems, characters can increase their statistics during the course of the game (or over multiple games). The GM then begins the game