designed various game applications specifically for the iPhone, including Robot Master, Dice Monster, Labyrinth and Pipes. Over several years Knizia has developed a number of hybrid boardgames with electronic components, most notably with German publisher Ravensburger. The first of these was the King Arthur adventure game in 2003, later updated for use with the iPhone in 2014. Other titles include Die Insel, the award-winning Wer War's?, Der Drei ??? and in 2015 Captain Black (notable for a talking ghost pirate captain and a 90 cm - 3 feet - 3D ship). Game characteristics Knizia's games cover many board game genres. He has designed small two-player card games, children's games, and even a live-action roleplaying game. One element of modern game design that Reiner Knizia has pioneered is abstract theme. Older themed games like Monopoly have traditionally developed their themes by trying to model or emulate the environment or situation they are thematically tied to. So Monopoly has players buying and developing properties as a real estate developer might. Knizia's thematic game designs tend not to try to model a specific environment, but instead try to invoke the thought and decision-making processes that are key to the theme. For example, Knizia's game Medici has a fairly abstract game system of drawing and buying cards that does not try to model any particular environment, but in the game-world, the players are always attempting to price risk, the key success factor in the investment banking business in which the Medicis made their fortune. A further example of this can be found in Knizia's game, Tigris and Euphrates. The players each take control of one of four different dynasties of Mesopotamia around 3,000 B.C. Each dynasty has priests, farmers, traders, and kings who are placed strategically on the board. The players take turns expanding their dynasties, controlling rivers, building temples, and attacking the other players' dynasties. Instead of Tigris and Euphrates having many complicated rules, the game is relatively simple and has very streamlined rules that does not attempt to emulate the real-life conflicts but rather abstracts this out, allowing for the players to focus on strategic decision making. This approach has allowed Knizia to develop games that are comparatively simple but require thoughtful game-play, while still retaining strongly thematic elements. Using his understanding of principles in mathematics to full effect, pricing and evaluating risk are frequently recurring elements in Reiner Knizia games. Many