GTA: Elite Squad
The zombies are coming and they would feast on the people if they can enter the city. Fortunately, there are those elite squad that would put their lives in danger just to stop them. The game is played with a mouse and the idea here is to defend the city. Don't let any of the zombies to get in. Each zombie kill would earn you money and would help you to recruit more defenders. You can also upgrade the defenders. The game gets much more difficult as you make some progress. There would be more powerful squad members that you can choose.