Blowing Up C4 On The Planes

Get to the top of the control tower to destroy the C4 you attached to the planes. Once you are at the top of the stairs you might have to destroy some spiders and a walker. Once they are destroyed go to the door to the left of the stairs door and immediately save your game. Then pull out your sniper rifle and go to the center window and shoot the C4 on two of the planes. Once you shoot the first one the hanger doors start to close so you have hurry and shoot the second one, then run out of the room and go left until you come to another door on the left. Go in that room and go to the center window and shoot the last two C4 planes before the hanger doors close. I have found that its much faster to shoot from the center windows because all you have to do is turn left and then right to shoot the planes. Hope this helps someone.

Second Thing: How To Defeat It

Go into to his garage and fix the electrical panel that operates the hoist. Step back towards the middle of the big door. There is an opening between two of the crates. Using your grenade launcher in first person targeting, send in a grenade. If the Thing turns its head toward you, then you have him targeted. Continue sending in grenades until he begins to burn. You can send in a few more if desired for extra fun. Run into the Thing's room and on the far wall from the big door is a switch. Throw the switch and watch as the Thing dies.

Get A Doctor To Follow You Into A Fight With The Thing

Use the following trick to get a doctor in the same room with you during your battle with the second giant Thing. Walk to the large garage door. Get the doctor close to the door as well. Then, tell him to not follow you anymore. Push him as close to the door as possible; and close enough to you that when you flip the switch to open the door he will not move. Before you flip the switch, tell him to follow you again. Flip the switch and when you are shown in the locked room with the second giant Thing, he should be beside you. Use him to heal you during the fight with the Thing.

Persuade A Person

When someone's trust is in the orange and they will not do anything for you, enter first person mode and aim the gun at their head for three seconds. They will now do things for you without good trust.

Hidden Trailer

Wait about one minute at the main menu to view a longer, uncut television trailer for the game.

Blood Test Kits

Save Blood Test Kits for showing your team that you are not infected to gain trust. Using them on a team member is useless because they get infected randomly, and usually break out within a minute of infection.

Saving Ammunition

Try not to give all your team members the same weapon because your ammo will go quickly. A good combination is you with a Shotgun or Machine gun, your second man with the one you are not using, then a Pistol. The rest depends on your ammunition supply.

Dumb Enemys

Always close the door behind you when you enter a room. This will prevent any enemy from getting inside and attack you.