The Eradicator is a deadlier variant of the Desolator used by China who constantly emits deadly radiation around itself and can irradiate larger parcels of land.
Where the Desolator was already an irresponsible, yet powerful infantry unit, the Chinese take it a step further in the form of the Eradicator. The Eradicator carries an experimental, even more lethal, radiation cannon, so much so that it constantly leaks radiation, thus making the Eradicator dangerous at all times to surrounding units. Like the Desolator, the Eradicator can deploy in order to irradiate the earth, however, his spread of irradiation is much larger.
If you believe that the Desolator is bad enough, think again. The Eradicator is by far one of the most powerful infantry outclassing even the Soviet Desolator in the original game. While its damage output is similar to Desolator, they have a few tricks on their sleeves. The Eradicator suit is constantly leaking radiation around it. This allow the Eradicator to damage any enemy unit (including cloaked and disguised ones) nearby making them quite dangerous to engage especially if the opposition can only engage in close range. Like the Desolator, they can deploy themselves to irradiate the surface. However, their weapon irradiates a surface much larger than the Desolator's, further extending the unit's ability of area denial. Their suit makes them immune to radiation especially their own weapon and grant immunity to Dogs and Spooks. The Eradicator is also a popular unit to enter inside the Centurion Siege Crawler (preferably 2) due to its damage.
Unfortunately, they still share the similar weaknesses of the Desolator. Like Desolator, deploying them can harm friends and foes thus it is necessary to be cautious on using it if any unit is nearby. Their rad cannon is useless against buildings, rogue Desolators/Eradicators and robotic units making them a sitting duck. Epsilon magnetic weapons can hinder them as well. Finally, the Eradicator is more expensive compared to the Desolator.
Rashidi has a limited number of Eradicators alongside some other Chinese units at his disposal in Obsidian Sands. The Eradicators guard his Topol-M. It's revealed that Rashidi had formed a secret coalition with Yunru and was able to procure and use Chinese technology.
In the Covert Ops mission Survivors, after the player recaptures a Scorpion Cell base, eight Eradicators will arrive as reinforcements and be given to the player.