The Summers Scream is a new Wonder Weapon seen in the map "Deep Freeze". It is the exact opposite of the Winters Howl, shooting out magma rather than ice. The magma will burn the zombies, harming them greatly and even killing them up until round 20. It is identicle to the M2 Flamethrower from Call of Duty: World at War, however rather than firing on a continuous burst the Summers Scream fires semi-automaticlly. It can also be used in conjunction with the Winters Howl, encasing the zombies in hard rock rather than ice. The rock doesn't break until hit twelve times by a zombie or shot at by human player.
The Summers Scream was originally a mining tool used by miners to melt away the ice so they could build the labs for a Russian base in Antarctica. Upon completion of the base the miners were killed and their tools became weapons used by the scientists and later Tank Dempsey, Nikolai Benski, Takeo Masaki, and Edward Richtofen.