Nova-6

Codename Nova-6 is a Russian experimental weaponized chemical gas developed by Russian scientists in Call of Duty: Black Ops. It was originally developed by Nazi Germany during the course of World War Two by Steiner, and intended to be used in V-2 rockets targeted at major capital cities such as Washington D.C and Moscow.

In 1945, Kravtchenko and Dragovich find out about its existence and intercept a shipment of it, capturing not only Steiner but a container of the gas itself. Due to a longstanding grudge, Kravtchenko and Dragovich use the members of the strike team as test subjects for the gas to witness its power. While Dimitri Petrenko, Vihalev and Belov are gassed to death, Reznov, Nevski, and Tvelin manage to escape the gas chamber with the arrival of the British SAS, dispatched to secure the Nova-6 for the Allies. Reznov and his men manage to repulse the attack and destroy the ship and the Nova-6 along with it.

Although the gas was destroyed for now, with Steiner alive it could still be resynthesized, which the Russians did. This Russian version of Nova-6 saw use in the fighting on Rebirth Island. Both sides, anticipating its use, continued the fight in hazmat suits.

In Dragovich's plan to "strike at the heart of the west," sleeper agents all across the United States would release Nova-6 after receiving the broadcast from the Rusalka.

Appearance and effects
In the form the Nazis developed, Nova appears as a greenish gas. Upon inhalation, it causes vomiting, violent coughing, muscle contortions, and blackening of the skin (necrosis), followed by an agonizing death in 20-30 seconds.

In the more refined Russian form, Nova is an orange color with a much more instantaneous effect. Death happens before the body can even hit the ground.

Trivia

 * The achievement "No leaks" appears in Black Ops for surviving the use of Nova 6.