Mark Rein is vice president of Epic Games, creators of the Unreal Engine and the "Unreal" game franchise. Rein is known to often give assessments of the progress of his company and gives a monthly update in the magazine "Game Developer" where he provides a short update on the state of the Unreal Engine. Wikipedia
The definitive Wikipedia entry for Mark Rein. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Mark_Rein