Earlier this month two indie game developers, Wolfire Games and Unknown Worlds Entertainment, came up with a nice pre-order bundle for their upcoming action game Overgrowth and the FPS-RTS game Natural Selection 2. Now Wolfire has revealed just how well the game bundle sold and it sound like the deal exceeded expectations.

The bundle deal basically let players purchase two upcoming games for the price of one. While Overgrowth generated a total 1,100 pre-orders in a year before the bundle deal with Natural Selection 2, the bundle deal generated 1,658 pre-orders during the week of the sale. Even during the promotion, regular pre-order deals went up for both games. In fact the bundle got more popular during the last hours of the sale with Wolfire saying, "We had 3 sales in the last 30 seconds alone." One wonders how many more sales would have been made if the bundle deal had been extended for another week.