Contrary Motion : The designed intent of a game element that is functionally against the intent of at least one other element. Basically, an obstacle or enemy
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}