Instructions
Aim at the zombies in places that give you more points. While a lethal headshot will give you 100 points, a lethal neck shot will only give you 70 points, a lethal body shot will only give you 60 points, and a lethal limb shot will only give you 50 points.
Use your knife to slash at zombies while you're in the lower levels. Lethal knife slashes will give you 130 points, which is even more than a headshot. The knife does lose its effectiveness in higher levels so it is important to use it as often as possible in lower levels, such as One to Five.
Take a stand every time you get the double point bonus. This bonus will drop every so often right after a zombie is killed and it lasts for 30 seconds. As the name suggests, every point you get while the bonus is active will be doubled.
Buy ammunition, new guns and new areas of the map only when you need them. If you expand your area too soon, buy more ammo when your guns are close to full or if you switch guns still loaded with a decent amount of ammo for new guns, you will be wasting points. Spend your points wisely and you'll always have a good point count.