You can also use a headset communicator to chat to whoever you are playing the game against - wherever they are in the world.
Ant and Dec helped launch Xbox Live
But to play Xbox Live you'll need £40 to buy the headset and a year's subscription to the service, as well as a super-fast broadband internet connection.
It's already been launched in the US, and around 350,000 gamers have signed up to take on their mates over the web.
Sony are planning to launch online gaming for the PlayStation 2 later in the year after testing it later this month.
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