Dr. GreenScreenshot 

 

Dr. Green has unleashed his Robo Hounds and Green Goblins in an effort to take over the city. You and your trusty shotgun must stop him! It won`t be easy, so move quickly and be smart when you are attacked. You have 5 lives and there are two tightly guarded med kits hidden in the city to help you survive. Dr. Green is now compatible with Windows Vista and is still completely free. Check out all OTS Software games at http://www.OTSsoftware.com

Screenshot of Dr. Green