It’s officially Collectibles Week in the Google Play Store. Over 20 games are joining in on the fun and they will be giving away free exclusive in-app purchasing for free. Click here to find out what games will be participating in the event and what they will be giving away. It looks like users from all over the world can participate in this event as there is a section for US and non-US gamers to choose from. This is a great move from Google and it should help ignite more in-app game purchases.