An extensive form game can also be referred to as a game tree or a sequential game. It is a type of game in which players make decisions sequentially, with each decision affecting subsequent decision points. Some other synonyms for an extensive form game include a tree-structured game, a decision tree game, or a perfect information game. Perfect information means that each player has complete knowledge of the moves and strategies of all other players. In contrast, an imperfect information game is one in which players have incomplete information about the other players' moves and strategies. Extensive form games are commonly used in game theory to study strategic decision-making and can provide insight into real-world situations such as negotiations and auctions.