Tripwire Interactive has announced that the latest Free Booster pack for their World War II first-person shooter Red Orchestra: Ostfront 41-45 is now available via Steam. It contains a new map (Lyes Krovy), a brand new weapon system (smoke grenades), quicker tank reloading, changed victory conditions and multiple bugfixes. We remind you that you can play for free this game, from Wednesday August 2 through Monday August 7. Press 'read more' for details and grab the new trailer.