Martin Jonasson and Petri Purho on Making Your Game Juicy

A "juicy" game feels alive and responds to everything the user does.

This talk - given by Martin Jonasson and Petri Purho at Nordic Game Indie Night - demonstrates how juiciness can be manipulated.

References:

Robert Penner's Easing Equations

Gamasutra: How to Prototype a Game in Under 7 Days by Kyle Gray, Kyle Gabler, Shalin Shodhan, and Matt Kucic

Emily Short - Make it Juicy!

The Disney 12 Principles of Animation

The Art of Diablo 3 with Christian Lichtner

Easing Function Generator

Thanks to Dr. Christy Dena for the link.