Hong Kong has turned into zombie city in one night due to unknown virus outbreak.The zombies are deadly and they are hunting for fresh meat across the city. You are being trapped on the rooftop of an office building in the city centre and are waiting a rescue helicopter. Unfortunately, the zombies are coming after you to the rooftop. You must keep yourself alive for 5 minutes before the rescue helicopter arrives.

1. The zombies are deadly. Avoid being caught or touched by any zombie on the rooftop of the office building. 2. You must stay alive for 5 minutes before the rescue helicopter arrives. 3. You will eventually face up to 20 zombies in this critical situation. 4. Be careful. The behavior of the zombies are hard to predict.