Warner Bros unleashed a group of black cats across London on Friday to promote the launch of its new computer game F.E.A.R. 2: Project Origin.
The trained cats are prowling the city wearing branded cat jackets aiming to play on the superstitions of passers by spooked by Friday 13.
The game was released on Friday 13 because of its horror inspired content.
A hotline for cat owners wanting to turn their own pets into walking ads for the game has also been launched.
Warner Bros claims it had been inundated with calls from cat owners requesting the branded cat jackets.