Doesn't look at examples from a game's levels, rather it focuses on arbitrary arrangements and groupings. Open variation can also consider possible scenarios
Richard Hakem Terrell (KIRBYKID), An indie game designer, video game consultant, tournament organizer, competitor, writer, musician, artist, and teacher), Critical-Gaming Network (Critical-Glossary), Dallas, TX, USA 2007 (updated 2013). http://critical-gaming.com/critical-glossary/, (Ergo - Amer) {747}