has announced that anyone who buys Grappling Hook
via this website
will have the chance to get a copy if the game for free, plus a 50% off coupon for a friend. You win if the last digit of your order-number is the winning digit, which will be announced on 1st March 2010 - the offer is valid until February 28th. Grappling Hook is available for Windows, Mac OS X, and Linux.