Very easily! Simply add to your pledge the amount of the pledge level for each additional game you would like. For instance, if you are pledging at the Survivor level and wanted three copies of the game, your pledge would be 59+59+59= 177€
For each additional reward from the 2nd and up to the 7th (and last), shipping cost is divided by 2.
Simply click on the "manage my pledge" button in the top right-hand corner of the Kickstarter page. On the next page there will be a bar with your pledge total. Add the amount of the add-ons to that sum, hit "confirm” and you're done!
Please note that additional shipping cost may be required for some optional buys. These will be charged after the campaign ends.