Spreading out munitions
Do not give too much of the powerful items such as tank mines, C4, anti-tank guns, etc. to a single person. If you have this person advance and he gets taken down by a tank, your other teammates might not have the firepower needed to even get close to the downed person, let alone heal him. It is always a good idea to have each teammate equipped with at the least one high powered explosive in case you need to take something out.
Weak spots on tanks
All tanks have very heavy front and side armor. However, the tank's rear is lightly armored. Smaller tanks can be hit with a rocket almost anywhere and will usually explode. However, larger tanks must be attacked with an explosive from behind. If you shoot it from the front or side, chances are you will not even make a dent.
Last resort attack on tanks
If you need to take out a tank but have no more long range rockets, it is possible to get close to it without getting hit. First, you will need to have a sniper rifle to zoom in on the top of the tank to take out the gunner, if there is one. After he is down, throw a smoke bomb in the direction of the tank. Try to get the smoke bomb in as close to it as possible. While the smoke is in the air, you can run up to the tank without being hit. The smoke will make it impossible for the tank to see you. Get directly next to the tank and plant a C4 next to it. After it is planted, throw another smoke bomb slightly further away from the tank. Make a mad dash for the smoke. If you are fast enough, you will get behind the wall of smoke and can then make your way to safety. Then, detonate the C4.
Press X(2), Y(2), click Left Analog-stick(2), Right Analog-stick(2), press L(2), R(2) at the main menu. There is no confirmation message. Start a game then pause and enter the options screen. The "Cheats" option will be unlocked at the options menu, with "Trooper Level", "Enemy AI", and "Mission List" selections. Note: Do not set the "Trooper Level" option to "Full", as one bullet hit will take half of your life away.
BLOW UP TANKS WITH C-4!!:
When you have to blow up a tank and you dont have any rocket launchers, take your C-4 and have it out then have another team member, or you, throw a smoke bomb right next to it then the person with the C-4 runs to the tank and you have to get all the way against it then crouch down and and face it put one piece of C-4 on it then throw another smoke bomb and when it covers the tank or makes it so it cant see then get on your feet and run back to your team members then detonate the C-4.
Beating the last level:
Ok when you get to the very last level put some mines in front of the building so when the guy runs out he will die and you wont have to run after him and kill him. Do all that before you use your laser.
Beating The Tank Level (You get to use):
First you have to get all the rockets in the first part of the level. Then take the tank and blow up the tank shooting at you, just after the first barricade. If you look just off to the right there is a pass that will bring you to the closest tank. Look to the right and blow up that tank too. First tank, throw a smoke grenade then run up plant the C-4 and run! Do the same thing for the second one parallel to the first. If you look directly after the second non-blocked tank there is a pass that ends at the cliff. Destroy the tank and the guy. Turn around and go left down the road. BE CAREFUL!!! A tank is waiting for you around the corner. Destroy that tank with yours then move on. The rest of the level shouldn't give you much trouble. Good Luck!!!!
Heal Dead People:
When one of your people die, right when they fall get your medikit. go over to him and it will say, "heal" press the A button it will heal them almost all the way.