pegi

Pegi (Pan European Game Information) is a rating system that advises customers to what age rating is suitable for content in a video game. PEGI was established to help European Parents make informed decisions on buying video games. It was launched in spring 2003 and replaced a number of national age rating systems with a single system now used throughout most of Europe, in 30 countries. It is being introduced to make sure that content in games is not being consumed by audiences deemed to young to be exposed to it. For example GTA is rated 18+ as the media regulators feel that the violent nature and criminal themes of the game, are too mature for anybody below the age of 18 to consume. 
If someone has come to buy a game they must now prove there age to the seller so they are able to buy it. Previously it was rated through BBFC but they have stopped doing it now and all games are rated by Pegi.