This has all happened before, but will all of it happen again? As it did last October, Valve has briefly cut the Steam price of Red Orchestra to a paltry $5. That's 66% off!

The sale, which lasts all weekend, is meant to celebrate the latest update to Tripwave's tactical PC shooter. That patch brought about Steam achievements and a new map.

Tripwire's tactical FPS Red Orchestra will soon see the addition of Steam achievements and a new free map, according to the developer.

The map, "Fallen Heroes," is set in the Russian Red Square. Planned for inclusion in the initial release, Fallen Heroes was cut and forgotten for years. Tripwire recently passed the map to community mapper Kevin "Dr. Guppy" Butt, who completed it for the free release.

For a look at the Red Orchestra Steam achievements, click on through:... Read more

Not content with offering up user-created mods for Valve-developed Source-engine powered games, Valve has expanded Steam's offerings to include free mods for Tripwire's 2006 first-person shooter Red Orchestra: Ostfront 41-45 (PC).

Available now, the first Red Orchestra mod on Steam is Mare Nostrum, which brings three nationalities to the game along with 8 new maps, 8 weapons, and 10 vehicles.

In celebration, Tripwire has dropped the price of Red Orchestra to $4.99, a 75% price reduction that will run until the end of the weekend.

Upon purchasing Red Orchestra, any compatible mods will be listed under the "Not Installed" portion of Steam's "My Games" section. As with the previous batch of mods, the community-made Red Orchestra add-ons will be automatically updated by Steam, just like any other game on the digital distribution platform.