Social Games

Shrink Ray was a social game where if you did not pass certain tests you got shrunk and put in a bottle. As you were shrinking you had time to e-mail your friends and tell them how to avoid the trap in which you were caught. 7,000 friends enjoyed the special effects and posted 3,000 comments in the bottle in less than two months.
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Spirogram makes addictive use of e-mail by allowing visitors to send and receive spiral encoded messages. Hundreds of sites have downloaded the code to host a Spirogram machine. When friends send Spirograms to friends, they are instructed in the e-mail to go to the host's site to decode the message. A guaranteed traffic-builder.
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Utopia is a tantalizing mystery set in seven days of Utopia. The mystery had a $500 prize for the first person to solve it. There was a month-long line-up period to give visitors an even start. The first day was free if the visitor e-mailed 10 or more friends. The friends were depicted in line and 10,000 friends were e-mailed with 40 screens of line-up.
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Other games on Dan Zen ask for e-mail addresses for registration. Prediction Train uses the e-mail address as a ticket. The grim Reaper requires the visitor's e-mail address so they can't hide once he guesses their age. Tower of Babel gives people the option to sign their entries with their e-mail address. Every game has a different e-mail invite screen. Telepathy is Dan Zen's newsletter...
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