[13.] Bernd Kreimeier. 2002. The Case For Game Design Patterns. Gamasutra. Retrieved from http://www.gamasutra.com/view/feature/132649/the_case_for_game_design_patterns.php?print=1
Excerpt from article: This article proposes to adopt a pattern formalism for game design, based on the work of Christopher Alexander. Alexandrian patterns are simple collections of reusable solutions to solve recurring problems.
Doug Church’s “Formal Abstract Design Tools” or Hal Barwood’s “400 Design Rules” have the same objective: to establish a formal means of describing, sharing and expanding knowledge about game design.