Being up-front about the cost of in-app purchases before the game is downloaded.
Banning language that exploits children, like suggesting your pet will get ill if you do not spend money.
Making it clear how to contact the business if you have a complaint.

Many of the most popular games are freemium titles which can be downloaded for free but have in-app purchases.

The OFT will publish a final version of the guidelines by February and begin enforcing the rules in April.