The Game Sets up a Team of Saviors to Save the Apocalypse

You start out trapped in your own shelter. Xiao Yuan accidentally unlocks the doomsday salvation simulation system! As long as you save the world in the simulated world, you will receive generous rewards and escape from here! Establish a team of doomsday saviors, codenamed "Tiangang". Xiao Yuan decided to save all the worlds from doomsday and save himself at the same time! Later, when he opened the door of the sanctuary, The world you live in has been invaded by the zombie virus and is in great danger! Xiao Yuan opened the corner of his laboratory and dug out something: "Oh, what a coincidence, I have a vaccine here." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.