In the 'Get the Game', 'Prototype Pronto' and 'Personalised Art Prototype Package' reward levels, you can add AU$34 to your pledge for every extra game you want to get.
i.e. After you select the reward you want, a dropdown list of shipping destinations appear. Select your shipping destination, and the pledge amount will automatically update to reflect your shipping cost. The pledge amount is an editable field, so you can then up the price. At this point you can add AU$34 for every extra game you want (e.g. regular pledge amount + AU$34 x [number of extra games]).
For example, if you wanted three games shipped to Australia, you would choose the 'Get the Game' pledge level, choose Australia as the shipping destination, then add the extra cost to your pledge amount. That would be AU$39 + AU$10 shipping as your base, and then you would need to add an extra (AU$34 x 2). So you should enter AU$117.
We'll cover the extra shipping costs for the extra games.
Also, please note, there's also a further discount with the 'Book Club' pledge level, where extra games are only AU$30.