Phantom EFX has announced that their historically-based first person shooter, Darkest of Days, is set to launch on September 8th, 2009 for both Windows-based PC and the Xbox 360.

“Working on Darkest of Days has been, without a doubt, the crowning achievement in both my personal career and that of Phantom EFX,” said Aaron Schurman, CEO of Phantom EFX. “The past few years, everyone here and at 8monkey Labs has been working incredibly hard to create this title, one that we feel will give gamers plenty of memorable entertainment and serve as a gigantic breath of fresh air into the FPS genre.”

In Darkest of Days, you take on the role of Alexander Morris, an unlucky foot soldier who gets transferred to General Custer’s regiment days before the Battle of Little Bighorn. Moments before his inevitable demise, a futuristic time agent warps in to save Morris and transports him to the future where he is told that time travel is now a reality. However, an unknown faction is attempting to re-write history for their own benefit. Your job is to stop them, and you’ll fight your way through eras spanning thousands of years to do it.