Interactive Storytelling: Approaches and Techniques to Achieve Dynamic Stories

In this paper we review different techniques which can be used to achieve interactive storytelling in games, most notably the employment of planning algorithms to decide which and how events should be presented to the player at a given time, and the definition of non playing characters actions and behaviours as a response to the player’s actions. Furthermore we will consider game world with more interesting characters that react to other characters actions and behaviour, while forming bonds and relationships with them and the player. We will consider the use of emotional characters to this effect. The incorporation of narrative techniques into the storytelling used in games can help not only to increment the level of interaction between the player and the world and characters, but also to keep the story fluent, thus achieving more realistic narrative. We will examine and discuss some of them, along with some existing approaches and possible applications for interactive storyline generation. We will also review and discuss some areas in which emotional characters have been used to support the player, and in the development of interactive storytelling.