Ibidex (http://www.ibidex.com/ ) has introduced Petri 0.8 for Mac OS X (10.9 or later), a local multi-player shooting game using smartphones as controllers.

Suitable for all ages, Petri is available to play with up to 16 players. Using Ibidex's multi-player connectivity, anyone with the free universal Ibidex iOS or Android controller app can join the game.

"We wanted to build something that allows large groups of friends to play together. Not strangers," says Steve Olesansky, CEO of Ibidex. "The solution was simple, once we thought about it. Why not use smartphones - the most accessible controller in the world? Ibidex multi-player technology uses your own device to draw everyone in the room into an inclusive and shared experience."

For a limited period of time, Petri 0.8 is free and available worldwide through the Mac App Store in the Games category. It will be priced at US$6.99 after the introductory period. The Ibidex controller app is available for free on the Apple App Store and Google Play Store.