The Big Model
System Does Matter (July 1999)
GNS and other matters of role-playing theory (October 2001)
Simulationism: The Right to Dream (January 2003)
Gamism: Step On Up (June 2003)
Narrativism: Story Now (January 2004)
The Provisional Glossary (May 2004)
Wikipedia article – the diagram is very good except the arrow should stop inside the deepest/most-internal section, not emerge out the other side
Setting and emergent story (October 2011)
Other Essays
Fantasy Heartbreakers (April 2002) and More Fantasy Heartbreakers (January 2003)
A hard look at Dungeons & Dragons (June 2003)