Glossary of game theory terms.

Sequential Game

A sequential game is one in which players make decisions (or select a strategy) following a certain predefined order, and in which at least some players can observe the moves of players who preceded them. If no players observe the moves of previous players, then the game is simultaneous. If every player observes the moves of every other player who has gone before her, the game is one of perfect information. If some (but not all) players observe prior moves, while others move simultaneously, the game is one of imperfect information. Sequential games are represented by game trees (the extensive form) and solved using the concept of rollback, or subgame perfect equilibrium.

updated: 15 August 2005