Willem Pennings, a Senior Consultant at BTS, told CNN that businesses approach BTS to request custom-made simulations that replicate the way their business functions or that teach specific skills.

CNN: Tackling business problems with online games

But simulations aren't only used by business schools -- they are equally in demand with companies wanting to arm employees with new skills.

CNN: Tackling business problems with online games

Professional graphics cards are used primarily by business professionals that need powerful graphics for the purposes of demonstrating designs and complex simulations.

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Last year, Harry Kat, a professor at City University's Cass Business School in London, and three others used American stock and bond data from 1970 to 2003 in thousands of simulations measuring risk and return on ten-year Treasury bonds, alone and in more diversified portfolios.

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