Penned by Haden Blackman, Shawn Pitman, John Stafford and Cameron Suey, the game beat out fellow game nominees Command & Conquer: Red Alert 3, Dangerous High School Girls in Trouble!, Fallout 3 and Tomb Raider: Underworld.
Last year, D3 Publisher's Dead Head Fred, written by Dave Ellis and Adam Cogan, took home the videogame writing award.
September 2008's The Force Unleashed was a commercial success for LucasArts, which reported opening week worldwide sales of 1.5 million units.