Global Invasion: From the Start, I Turn In a Dungeon

News reports:

[An enormous King Kong attacked Times Square in the United States of White Eagles, causing heavy casualties.]

[A gigantic humanoid machine appeared in Bear Country and bombed a city.]

[Sadako appeared in the Samurai Nation.]

Just then, Su Hao's System awakened. It informed him that the world was under invasion by entities of malice, and he had only two choices:

1. Survive alone: Stand by and do nothing. After humanity perishes, gain infinite lifespan.

2. Savior of the world: Repel the invasion of Jiuzhou Nation, gain a bound Interdimensional Gate, and receive one instance of Predator vs. Alien.

Survive alone? That's not my style!

Without hesitation, Su Hao handed the instance over to his country.

Aliens, huh? Can you withstand rocket launchers and tanks?

Predator, your shoulder cannon is great, but it's ours now!

From then on, while other countries struggled desperately to fight off the invasions, Jiuzhou Nation had already ushered in the era of super soldiers...