One of the most powerful figures in the video games world has resigned.
By Iain Mackenzie
Newsbeat technology reporter
The Sony PlayStation has faced stiff competition
Phil Harrison was in charge of Sony's games division.
He was regarded as one of the driving forces behind the success of the PlayStation consoles.
It is believed he may be leaving to join Atari.
Phil Harrison's been with Sony for 15 years, climbing to the position of president of worldwide studios.
He's credited with making gaming more mainstream and shifting it away from boys-only shoot 'em-ups.
In recent years he has championed social and online gaming.
His department is currently developing an online world called Home which is similar to Second Life.
However, there are believed to have been tensions with Sony's top bosses in Japan.
The company is seen as having made a number of bad business decisions in recent years, allowing Nintendo to steal some of its market share with its Wii and DS consoles.