Activision has formally announced a co-marketing deal with Doritos and Mountain Dew to offer Call of Duty players double XP and double weapon XP for both Call of Duty: Vanguard and the battle royale game Warzone.

"One hand on the controller the other in a bag of Doritos," the publisher said in a tweet from the Call of Duty Twitter account. It's a simple promotion: buy the specially marked bags of Doritos products and redeem the double XP codes on the Call of Duty/Doritos website. The double XP also applies to specially marked Mountain Dew products.

The Doritos Call of Duty campaign was first revealed back in September when the specially marked bags of the chips began to appear in the wild.