Doomsday Game: I Can See Hidden Messages

[Profit first + building a shelter + speculating] Seven billion people are forced to participate in a doomsday game. This is a challenge between zombies and humanity. Survival is the only goal! What? Kill dozens of zombies to reveal a resource card? Isn't it a 100% explosion rate? It's the end of the world, and there are still doomsday merchants? Speculate and sell all kinds of goods, master front-end technology, and create endless wealth! After the catastrophe for the rest of my life, I finally see the light!