Games are serious business at the 2014 Tokyo Game Show

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Above, a Sony Computer Entertainment staffer test-drives Play Station 4's virtual reality headset Project Morpheus at the Sony booth at Tokyo Game Show 2014.

About 421 companies and organizations are participating in the expo, which runs through September 21 and takes place in Makuhari, east of Tokyo.

Below, expo attendees try out Oculus VR's headset, and a Galboa employee explains the company's new mobile game software to a visitor.

[images: REUTERS/Yuya Shino]