Después de meses de luchar contra el virus alienígena en Nuevo México, el mundo ahora tiene que librar con no solo su mundo siendo invadido por sino con un portal donde este 'virus' se desarrolló en un mundo diferente pero la enfermedad no es el peor de los problemas.

[This is a Revised and Remastered Version.] For years, Five of those Invaders have arrived on earth to prevent their total defeat in their world... SIRENs, an all Alien Shipgirls rained hell on our Navies. Sangvis Ferri, Military Android Girls went rogue from the future arrived to wipe out the human race. Reunion, led by Talulah caused chaos within our home and spread the Oripathy on those with a weak immune system. The Honkais, a mysterious, but hostile Monsters that turn our world into their haven. And the Replacers tried to turn our world into the Counter Side, just for their cruel Experiment... But... We were on our own. There's no Azur Lane or Crimson Axis Shipgirls to save us from the SIRENs. There's no Rhode Island's Operators to save us from the Reunion. There's no Griffin & Kryuger T-Dolls to protect us from the Sangvis Ferri, There's no Administration to stop the Replacer's Terraside Project. And there's no Schicksal's Valkyrjas to shield us from the Honkais or the Herrschers... Yet, we've held our Earth. Defended it from the Invaders and Enemy Factions. We've lost two billion people and have entered a Massive Economic Recession. A lot of people lost their home, their families, their wealth, and their jobs... A price for our victory. If we didn't manage to get them cross the rescuers to our world... We would have lost more than 4 billion or a total extinction... Still, we won't give up our people. And we'll do anything to restore our old from its former glory... But, always remember... War... War Never Changes...

As an USEC operator who caught himself in the midst of chaotic events, the attempt to escape from the city of Tarkov for him have failed. However instead of joining crowd of the dead, an incident in the middle of a firefight rescued him from the doomed fate of his inside the hell on earth, yet the cost is pricey. As he found himself in a world called Terra surrounded by unfamiliar people and different situations. But as the Chinese meaning for crisis goes, one represents danger and the other one represents opportunity, so does his journey in the world of Arknights.