Aspyr has released a demo version of Call of Duty, the World War II action game that lets you do battle as American, British and Russian troops. “In Call of Duty, you get to fight alongside your brothers-in-arms as history comes alive. In momentous battles from D-Day to Stalingrad, you’ll find yourself in incredibly real terrain, caught in breathtaking life and death combat. You’ll fight as American and British paratroopers and as a young Russian soldier conscripted into the Soviet Army.” The full game is priced at US$49.99.