In our world, peace was shattered in an instant! Parallel universe "breakthrough points" have suddenly emerged all over the world, and monsters from other dimensions have swarmed in, launching crazy attacks on the surrounding cities, putting human civilization in jeopardy!
To safeguard our homeland, we have built the last line of defense! Around each "breakthrough point", impregnable defensive walls have been erected, temporarily isolating the unknown terrors. Now, we are sending out a recruitment call to the whole world, looking for elite warriors from all walks of life!
Manipulate powerful armed machinery and conduct patrols on the defensive walls 24 hours a day without interruption, engaging in a life-and-death battle with the hordes of monsters. Every shot and every dodge matters to the fate of humanity. You will face monsters with various forms and superpowers. Utilize the powerful firepower and flexible manipulation of the machinery to guard this last bastion of humanity, prevent the monsters from breaking through the defense line, and defend our world! Get ready to join this thrilling cross-dimensional defense battle!