At the close of a three-week trial videogame developer and publisher ZeniMax has demanded $6 billion in damages in the case that it started against Oculus owner Facebook over the use of trade secrets to develop the Oculus Rift virtual reality headset.

According to the website Law360, ZeniMax asked a Texas federal jury to find Facebook liable for $6 billion in damages for allegedly building its Oculus virtual reality technology using stolen trade secrets.

In the case the company also specifically targetted several key members of the Oculus Rift development team, including Palmer Luckey, John Carmack and Brendan Iribe.

According to ZeniMax Carmack copied thousands of e-mails before leaving ZeniMax. The e-mails are said to include the source code of a prototype virtual reality headset that ZeniMax was reportedly developing before Oculus came on the market.

Oculus and Facebook have always denied the use of source code of ZeniMax to develop the Oculus Rift virtual reality headset, but according to ZeniMax Carmack admitted to copying data before leaving the company.

Besides the $6 billion in damages ZeniMax also demanded additional compensation from the three key members, making the damages total at roughly $6.7 billion.

The jury has not yet ruled on the matter and is expected to take months to reach a final verdict.