No purchase required at all! You just need to answer 5 simply questions. Closing date is 12 midnite, July 3rd (GMT-0600). Winners will be announced on Boardgamegeek.com.
For more information and to enter the contest, visit http://www.boardgamegeek.com/thread/115511.
p/s If you did not manage to win the game, you can buy it from our webstore next month at a special price (retail is rm219).