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Travel to the battlefield with powerful abilities and witness the ultimate showdown between defenders and lurkers!

After the war, the Lurkers were defeated across the board. The defenders took advantage of the victory and pursued them, trying to kill them all. Unexpectedly, their powerful firepower alerted the biological weapons sleeping in the Lurker's underground research institute. An unprecedented biochemical crisis broke out, and mankind faced an unprecedented battle of life and death. , At the critical moment, the two mortal enemies were forced to join forces. Long Yan, the strongest defender of the "Gun Demon", was ordered to go with the lurker troops to the place where the virus broke out - the underground research institute to search for virus samples. Whether they can successfully complete the task, and where should the fate of mankind go...