No description available.

As video game designers focus on immersive interactive stories, the number of game object interactions grows exponentially. Most games use manually-programmed scripts to control object interactions, although automated techniques for generating scripts from high-level specifications are being introduced. For example, ScriptEase provides designers with generative patterns that inject commonly-occurring interactions into games. ScriptEase patterns generate scripts for the game Neverwinter Nights. A kind of generative pattern, the quest pattern, generates scripting code controlling the plot in story-based games. I present my additions to the quest pattern architecture (meta quest points and abandonable subquests), a catalogue of quest patterns, and the results of two studies measuring their effectiveness. These studies show that quest patterns are easy-to-use, substantially reduce plot scripting errors, and their catalogue is highly-reusable between games. These studies demonstrate ScriptEase generative quest patterns are a desirable alternative to manual plot scripting in commercial, story-based games.