Video games can be used as learning tools to develop reading comprehension and other skills. They incorporate decision trees and causal networks that represent formal spaces of possibility and the basis of causal analysis in discourse processing. Walkthroughs that explain how to play games can be examples of narrative composition. When readers have strong comprehension skills, they can use higher-level processes to support lower-level skills like decoding. Games can represent design elements found in research and curriculum and motivate sustained engagement through play.