Mass Mayhem Zombie Apocalypse
The zombie apocalypse killed most of the people that you know. Now, you are alone, but you are not ready to die since there is little hope left in you. You know that someday, you can find other people. The idea here is to defend your port. You would start with a shot gun, but eventually you would get other weapons. You need to buy some upgrade to be get other weapons. You can get money by killing zombies. You need to eliminate all of the zombies before you can go to the next level. The game becomes harder and harder as you make some progress.