the Vr company Oculus was acquired by Facebook nearly three years ago.
the focus on vr is seen as an important part of the forward strategy for Facebook and Oculus Rift was the first vr headset on the market earlier in the year.
But now sued Facebook in two billion dollars, close to 18 billion, of the company Zenimax, which owns the game developing company Id Software.
A sum equal to the value Facebook paid for Oculus.
Zenimax claims Id Software's early innovations in vr has been used in the Oculus Rift.
At the intersection of the battle, says Oculus cto John Carmack, who previously worked at Id Software and is considered to be the brain behind the spelsuccéer like Doom and Quake.