Level 5 or above. In the game system setting of "Seven Days Kill", the crucible needs more than 5 engineers to be able to pass the production on the production platform, and the crucible will be finished after waiting for 5 minutes. Seven-Day Killing is a new open-world zombie game developed by TheFunPimpsEntertainment, which integrates the elements of first-person shooting, terror survival, tower defense and role-playing.