Red Orchestra 2 on sale and free-to-play this weekend on Steam

Red Orchestra 2: Heroes of Stalingrad, Tripwire Interactive's multiplayer WWII first-person shooter, is free-to-play this weekend and on sale in celebration of the game's recent content update, according to a post on the game's website.

According to its Steam listing, players can download and play the FPS at no cost through Sunday, Dec. 16 at 4 p.m. ET. Players will have access to the recently-released Fall 2012 Content Pack, which includes the Barashka map from the original Red Orchestra and a streamlined interface in the game's timed, objective-based Countdown mode, which is offering double XP this weekend.

Red Orchestra 2: Heroes of Stalingrad and its related Windows PC content is also getting a 75 percent discount on Steam this weekend. If you like what you play for free, you can pick up the typically $19.99 game for $4.99 until Dec. 17.