Publisher Activision is planning "the world's first over-18 live ad" to celebrate the launch of Prototype 2 next week.
Activision's event will take place in London's Covent Garden at 9pm UK time this Sunday, 22nd April.
The "gruesome and bloody" live action ad will see Prototype 2 hero James Heller face off against enemy Alex Mercer. Who wins? You decide. Activision says it will offer fans a chance to choose who's victorious via the game's official Facebook page.
The whole event will be streamed live there too.
"Such is the explicit nature of the ad it has been recommended as only suitable for those over the age of 18," Activision warned. "It has been agreed that it shall take place after the 9pm watershed to avoid a younger audience." Lock up your children.
Prototype 2 launches in the UK next Tuesday, 24th April on PlayStation 3 and Xbox 360. A PC version version follows on 24th July.