Scatter

Source Guns & Gears pg. 235
This weapon fires a cluster of pellets in a wide spray. Scatter always has an area listed with it, indicating the radius of the spray. On a hit, the primary target of attacks with a scatter weapon take the listed damage, and the target and all other creatures within the listed radius around it take 1 point of splash damage per weapon damage die.

Weapons

Blunderbuss, Dragon Mouth Pistol, Dwarven Scattergun, Explosive Dogslicer, Flingflenser, Spoon Gun