Radiant AI

The Radiant AI is a technology developed by Bethesda Softworks for The Elder Scrolls video games. It allows non-player characters (NPCs) to make choices and engage in behaviors more complex than in past titles. The technology was developed for The Elder Scrolls IV: Oblivion and expanded in The Elder Scrolls V: Skyrim; it is also used in Fallout 3, Fallout: New Vegas and Fallout 4, also published by Bethesda, with 3 and 4 being developed by them as well.^[1][2]

Technology

The Radiant AI technology, as it evolved in its iteration developed for Skyrim, comprises two parts:^[1]

Radiant AI

The Radiant AI system deals with NPC interactions and behavior. It allows non-player characters to dynamically react to and interact with the world around them.^[3] General goals, such as "Eat in this location at 2pm" are given to NPCs, and NPCs are left to determine how to achieve them.^[4] The absence of individual scripting for each character allows for the construction of a world on a much larger scale than other games had developed, and aids in the creation of what Todd Howard described as an "organic feel" for the game.^[3][5]

Radiant Story

The Radiant Story system deals with how the game itself reacts to the player behavior, such as the creation of new dynamic quests.^[1] Dynamically generated quests are placed by the game in locations the player hasn't visited yet and are related to earlier adventures.^[6][7][8]