买单买双的软件是什么意思

简介：This is a future world where mutated beasts are rampant. This is an era of armored warriors with superpowers. An era where ordinary firearms cannot break defenses and gunners are inferior. The protagonist comes with the soul of the National Assault game system, possesses useless materials, and leads the gunners. Rise up, lead the mercenaries to easily navigate the earth after the drastic changes, and finally go to the sea of ​​stars.