Zombie Rush 2: Zombie Threat

You are one of the last survivors left in the city fighting against zombies, suppress the number of zombies or hide out in the secret bunker before the government launches missiles to eradicate the city with you in it. Kill 1000 zombies by yourself or co-op with any other survivors. The government has given you 20 minutes to complete the task before they press the launch button. If you're unable to suppress the zombies before time runs out, hurry up find the secret bomb shelter before...