Darkest of Days is a historically based FPS where gamers will travel back and forth through time to experience history’s “darkest days”. The player uses period and future weapons as they fight their way through some of the epic battles in history. The time travel aspects of the game, lead the player on missions where they at times need to fight on both sides of a war.

"We are using the GeForce 8800 as our reference card for development for a reason. NVIDIA's platform provides the performance, image quality, and stability ideal for a title like Darkest of Days. It's exactly the way it's meant to be played."
Jeff Russell, Lead Engineer, 8Monkey Labs

Sometimes they are sent to undo a time anomaly they themselves have created. This allows gamers to use weapons from both sides and experience the wars in new unique way, and items that gave him an advantage in one scenario becomes a determent in another and vice versa.