Tribeca Film Festival co-founder Jane Rosenthal uses virtual reality goggles as part of 'The Oculus Rift Experience' at the Storyscapes Press Preview - 2014 Tribeca Film Festival at Bombay Sapphire House Of Imagination on April 22, 2014 in New York City. (Photo by Cindy Ord/Getty Images for the 2014 Tribeca Film Festival)

Video game publisher ZeniMax filed suit Wednesday against Oculus VR, the virtual-reality headset maker that Facebook recently acquired for $2 billion, accusing the company of infringing on its intellectual property.

The Rockville, Md. game publisher said in a statement Wednesday that Oculus and its founder, Palmer Luckey, are "illegally misappropriating ZeniMax trade secrets" related to the technology behind its Oculus Rift headset.

"Luckey has held himself out to the public as the visionary developer of virtual reality technology, when in fact the key technology Luckey used to establish Oculus was developed by ZeniMax," the company said in a statement about the lawsuit.

In a statement, Oculus denied the accusations and said it would vigorously defend against the claims. “The lawsuit filed by ZeniMax has no merit whatsoever," Oculus said. "As we have previously said, ZeniMax did not contribute to any Oculus technology."

The debate centers on who owns development work done by both companies when its virtual reality headset was just a prototype. At that time, Oculus chief technology officer John Carmack was a ZeniMax employee and was working on virtual reality technology. Carmack, a well-respected game developer, announced he would join Oculus in August 2013.  ZeniMax is accusing Carmack of taking key virtual reality technology with him to Oculus and using it in their headset.

According to a copy of the court filing shared with The Washington Post, the relationship started when Carmack contacted Luckey in 2012 after being impressed by material about the Rift that he'd read online. Luckey, in turn, sent a Rift prototype to ZeniMax's offices.

From there, the complaint says, Carmack -- still a ZeniMax employee -- worked with others at the game company to help develop the Rift ahead of a showing at the Electronic Entertainment Expo, the video game industry's largest trade show. Following that show, the Rift project gained wide exposure and eventually raised $2 million on Kickstarter -- growing momentum that eventually led to its Facebook acquisition.

The complaint says that  Luckey and ZeniMax then signed a non-disclosure agreement in 2012 that gave the game publisher "exclusive ownership of the confidential and proprietary information" covered under the agreement -- namely what Carmack and other employees contributed to the Rift. But as the project gained more public attention, ZeniMax alleges, Luckey began violating that agreement and was not properly crediting ZeniMax for its contributions.

ZeniMax had asked for financial compensation and equity stake in Oculus in exchange for the contributions it claims to have made to the Rift, according to the complaint. But efforts to settle the matter out of court failed and, ZeniMax claims, forced its hand.

“Intellectual property forms the foundation of our business,” said Robert Altman, chairman and chief executive of ZeniMax. “We cannot ignore the unlawful exploitation of intellectual property that we develop and own, nor will we allow misappropriation and infringement to go unaddressed.”