About this series: Guest Voices is a forum for a variety of articles related to game design or game playing by a variety of industry pundits and professionals. If you'd like to write a one-off Guest Voices article, please send email to shannona@skotos.net.

Guest Voices Column ...

• Interview with David Bowman of Tulga Games - #4: An interview about persistence, user creativity, and Horizons: Empire of Istaria.
• Storytelling Strategies: Some Observations from the Mortalis Victus Alpha Test - #3: A discussion of methods for telling stories in online games, using the Mortalis Victus alpha test as an example.
• The Cost of Insecurity: Griefing, from Anonymity to Accountability - #2: The problems of griefing in online games and a mathematical solution.
• Recruiting for Volunteer Games - #1: Our first Guest Voice, Todd Nilson, discuss the consistent process of recruiting for a volunteer game.