Build a Base: Accidentally Dominate the Apocalypse

The end of the world is coming and the world has fallen! Abandoned in a dangerous place, with his wife and children separated, Chang surpassed and obtained the super base system! "The construction value reaches the standard, redeem it for a battle robot!" "The prosperity of the base reaches the standard and new units are unlocked!" "Stop the tide of zombies and be rewarded with super weapons!" When you suddenly look back, there is no end of the world, it is just a small technological renaissance triggered by Chang!