Any object/system that restricts or redirects player progression or access. All locks must be able to be opened with a key. Locks can be in a locked, temporarily unlocked, or permanently unlocked state
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}