Excellent Games
Tips: Don't worry about the damage done to the barricade. As long as it is at 60% or higher, you should be good for the next round.
Early on, it is good to get backup. Once you have 4 survivors fighting with you (so 5 total) use 7 hours on finding weapons and 5 on finding survivors. It may have been random luck, but as long as I put 5 hours to searching for survivors, I maintained 7 total survivors until night 18. Also, with 4+ other survivors, focus your fire on the middle, as the backup doesn't have the ability to shoot zombies coming up the middle.
HEADSHOTS: Do not aim at the head. For the skinny models, aim at the neck. On the fat women, aim about halfway down their chests.
Army Guys: Shoot them in the legs with a Rifle.
My Rating of Weapons:
Barrett: This rifle seems to be .50 cal. and with a clip of 10 rounds, it is by far the deadliest weapon.
Hunting Rifle: Single-shot rifle with fast reload time. Good aim, use tip above to get easy head-shot kills with this gun.
AK-47: Do I have to explain an AK to you?
M4A1: Much like an AK-47 but seems slightly weaker.
Shotgun: Don't shoot at the zombies with this one until they are about halfway to the barricade. When reloading, it is not wise to wait for all 8 shells to be loaded. Press the Shoot button while reloading to stop reloading and you will have whatever number of shells have been loaded at that point.
Uzi: 50 rounds of spray n pray action.
UMP: 30 rounds from a relatively weak SMG.
Colt 45: Much better than the pistol. Two good shots to the head is a kill.
Sawn-Off Shotgun: Massive power. Very short range. 2 shots then alot of reload time.
Chainsaw: Excellent weapon if the zombies manage to get up to the barricade. However, not a weapon to get excited about, the zombies are damaging the barricade as you are killing them.