GDC 2011: Hocking on Dynamics.

Clint Hocking gave a really interesting, theoretical talk at GDC on dynamics as the main generator of meaning in games, as opposed to surface aesthetics or raw mechanics.

GDC 2009: Hocking: Intentionality and Improvisation.

Rather than forcing the player to adhere to a fixed script, improvisational play and complex systems encourage the designer to give up control and put the power to have fun back in the player’s hands.