By Jonathan Davies
Microsoft has bought Mojang, the Swedish developer behind popular video game Minecraft for $2.5bn.
Minecraft allows users to build structures using retro lego-style bricks, explore worlds and battle other users.
It has sold more than 54 million copies so far, and Mojan's three founding directors who are leaving the company, assured fans that "everything is going to be OK".
Some analysts believe Microsoft made the move to attract more people to its Windows Phone devices.
Minecraft is one of the top sellers on Apple's iOS and Android, and has recently been released on Xbox One and Playstation 4.
Mojang was founded in 2009 and made a profit of around $100m last year, employing around 40 people.
Microsoft chief executive Satya Nadella, said: "Minecraft is more than a great game franchise - it is an open world platform, driven by a vibrant community we care deeply about, and rich with new opportunities for that community and for Microsoft."
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