The Tetralogy Timeline is a timeline based off of concept material from Lori and Corey Cole; the Tetralogy concept. It assumes that present events in QFG1 through QFGV games occurs over the course of a year. It is supported within the games by a single series of references about Dr. Cranium and Antwerp population explosion in Spielburg (see Trivia). It it is unclear on if the events of QFGV (Winter) occurs before the new year or after, and it can only be speculated. This timeline and theory is not compatible with the official Mordavia History of Events: A Time Line by Lorey and Corey Cole from the Quest for Glory: Shadows of Darkness Hintbook (which places QFG2 several years before QFG4). Due to the incompability between the source material; the official Quest for Glory: Shadows of Darknes