Minecraft Creator and Gabe Newell Join List of World's Wealthiest - GameSpot

Both Markus Persson and Valve co-founder's net worth estimated at $1.3 billion. Bill Gates remains world's richest person.
Minecraft is a game that involves players creating and destroying various types of blocks in a three dimensional environment.

Gaming Has a New Billionaire - GameSpot

Develop - Issue 116 - May 2011 by Develop - Issuu

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Gabe Newell, Notch Make List Of World's Richest People

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Gaming Has a New Billionaire - GameSpot

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Gabe Newell and Notch are Two of the World's Richest People

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