America’s Army: Special Forces is a free team-based tactical first person shooter published by the US Army and distributed for free over the Internet. The game is available for Mac, Windows and Linux. The new 2.1 version, codenamed “Downrange,” is available for download. It incorporates many new features, including a new “Karma Physics Engine” that provides more realistic physics and character animations. Also added in this release is the M136 AT4 anti-tank weapon, a new armored vehicle called the Stryker, a new “Tournament Mode,” a new “Demo/Kiosk Mode,” two new maps, and many other changes. The full version measures 743MB, but if you have the 2.0a version, a 109MB update patch is available for download instead — a list of download mirrors is available from the America’s Army Web site. System requirements call for a G4/700MHz or faster, 256MB RAM, 1GB of hard drive space, and an ATI Radeon 7500 or Nvidia GeForce2 MX or better graphics system.