Zombie Hunter ZoHun

What’s the most exciting things for gamers?

New Game!
Play game until you drop!
Become no. 1 rank!
Get ultra-rare equipment!

Well, that’s all true. But for me is playing the game you like and still get money or get paid for it.

Hua Shu, a university student and game otaku, get invitation to become beta tester for a new game along with 3 his roommates. The new games title is “Zombie Hunter” take setting in after apocalypse world where zombies and mutants roaming all around the world. The tester who manages to survive until the test period ends will get ample bonus and prize.
Wait, doesn’t it sound so normal? Like ordinary game you play?

But not in this story.
Why? What’s the secret? What’s the hint?
Sorry, no spoiler, just read until the end.