There's a number of times I have downloaded a 'free' game only to discover that in order to progress with new weapons or what-have-you, you have to purchase them. Since this is something I do NOT wish to do, these games are immediately deleted. I would like to suggest that these games, requiring in-app purchases, be clearly labeled as such so that we do not have to waste our time on them unless we wish to spend the money. I'm sure I'm not the only one who is thoroughly irritated by this practice. Give us all a break.