Steam News announces that Red Orchestra: Ostfront 41-45 is now available for OS X. In related news, Steam News also announces a few other bits of news about Tripwire Interactive's World War II shooter, saying four of the winning community maps from the Counterattack Map Contest are now available and that the game is currently on sale for 85% off its regular price. If you're tempted by the bargain but still on the fence, they are also currently conducting a free weekend which will run until 4:00 pm EDT. Update: It's the original Red Orchestra that's now available for OS X, not RO2, as the headline for this story originally stated. Apologies for the confusion.