Mad Science Defense

Your task in this Flash game is to protect the laboratory from a zombie invasion. A scientist is inside, having created a unique new drug with one very unpleasant side effect: its smell attracts zombies from all around. The scientist will need time to eliminate this flaw, and you will need dexterity. Play an online fight against monsters and save the professor!

W/A/S/D to move the balloon, Shift to use a boost, Space to change weapons, mouse to shoot.