Both the iPhone and iPad version of the classic PC hit Duke Nukem are available for free, down from 59p / 99c.

Duke Nukem 3D and Duke Nukem 3D SE (iPad) faithfully recreate the gameplay of the original title, whilst improving on the graphics and tweaking the controls for touchscreen.

The irreverent first-person shooter has gained multiple accolades on iOS, including an appearance in Apple's 'Best First Person Shooter' category.

Although there is no closing date for the limited time sale, it's unlikely to last beyond Christmas, so those looking for some FPS fun should grab Duke Nukem 3D soon.