The makers of Second Life, VRChat, and other virtual reality games are facing claims that they infringed an interactive virtual theater patent.

Plaintiff Virtual Immersion Technologies Aug. 30 brought patent suits against seven companies, including Linden Research Inc., Sine Wave Entertainment Ltd., VRChat Inc., and Raytheon Co., Bloomberg Law data show.

The companies are infringing U.S. Patent 6,409,599, which allows people to interact in a real-time, virtual environment with live performers, according to Virtual Immersion’s nearly identical complaints filed...