Raph Koster is a renowned game designer known for his work on Ultima Online and Star Wars Galaxies. He argues that games are puzzles that teach players to solve problems and learn patterns by practicing permutations in a low-stakes environment. Fun comes from the cognitive challenge of mastering a problem and the release of endorphins from learning. Boredom occurs when a game provides no challenges. Serious games discussed at a Canada symposium included virtual training simulations, educational games, and social issue games addressing topics like homelessness, pandemics, and geopolitics.