By Iain Mackenzie
Newsbeat technology reporter
There is growing concern about harmful content in video games, according to Gordon Brown.
The Grand Theft Auto games are often criticised for their violence
The prime minister believes it could be linked to a rise in knife crime.
Last September the government commissioned psychologist Dr Tanya Byron to look into the issue.
Since then she's been speaking to children, parents and the people who make video games. Her final report is due to be published at the beginning of March.
Depending on its findings, there could be big changes to the way video games are sold in the UK.
The current age ratings system, which is partly voluntary, could be toughened-up.
There may also be tougher rules about the type of violence allowed in video games.
An appeal against banned video game Manhunt 2 is going through the courts at the moment.
The British Board of Film Classification (BBFC) rejected it twice last year saying it demonstrated "casual sadism" and an "unrelenting focus on stalking and brutal slaying".
The game involves murder and armed robbery.
What do you think?
Newsbeat will be taking an in-depth look at the issue.
We want to hear your views.
Do you play video games intended for older people? Are you a parent who thinks violent games have changed their child's behaviour?
Perhaps violent games are banned in your home. Whatever your experience, let us know.
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