PlayFirst has announced that Diner Dash has launched on Facebook. The game, which has been downloaded a half billion times in its various forms, is currently playable in beta mode and can be played at http://apps.facebook.com/dinerdash.

Diner Dash is the first Facebook game to embed robust time management gameplay in a truly social environment, said Eric Hartness, Vice President and General Manger of Social Games at PlayFirst. We ve taken the addictive gameplay that has made Diner Dash so popular on PC, Macs and iOS mobile devices and accented it with a rich ensemble cast and narrative elements that bring new depth to the Dash experience. Diner Dash propels restaurant games on Facebook to an entire new level!

The Facebook version of Diner Dash perhaps unsurprisingly has a town management system. Using tips from the restaurant, players help Flow clean up the mess Mr. Big has caused in DinerTown park, and unlock other restaurants like Tony s Ristorante and Margarita s Cantina.

We ve brought together all the compelling Diner Dash elements that have made it the number one time management franchise and married that to the social experience of Facebook, said Mari Baker, CEO of PlayFirst. Diner Dash on Facebook points the way forward to a new class of time management game while retaining the authentic Dash gameplay that made the series so popular.