Catacombs Survival: I gained the ability to sign in

After waking up, more than 70 billion people around the world were locked in the cave world.
There are mud walls all around, start with a pickaxe, dig out the mud wall and you will find the next room.
There are monsters, food, water, and manufacturing materials in the room.
Life or death depends entirely on fate!
Jiang Yu was forced to participate in the game, but his ability was to sign in.
[Congratulations to the host, sign in and get a Gatling machine gun. 】
[Congratulations to the host, sign in and get a hundred times crit reward]
【…】

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