Pre-order Assassin’s Creed III for Xbox 360 or PlayStation 3 at Walmart in the United States and you will receive the “Dangerous Secret” single-player mission pack and be able to unlock the Flintlock Musket in-game weapon.

Set out to discover and unbury a dark secret in this exclusive single-player mission that could decide the fate of the Revolution. In addition, unlock the power of the Flintlock Musket – a perfect shot for tight spaces.

Images are in the gallery below. Assassin’s Creed III will be released on October 30th, 2012.