Doomsday: My Fortress Unlimited Upgrades

Ten years after the end of the world, I was betrayed by my brother and girlfriend, and died tragically in the shelter I built! Once reborn, one month will count down to the end of the world! Looking at the two billion in the account, I smiled. Don't you want my supplies? Good! In this life, I directly hoard tens of billions of supplies and build an impregnable steel fortress! When the eternal night falls and you are wailing in despair in the extreme cold of minus 70 degrees, I am eating hot pot and singing songs in the fortress. As for the doggy couple? Don't worry, the game has just begun!