Instructions
Start a new game. When the training level loads, walk towards the yellow objective marker to start your mission.
Crouch down behind the wall to enter cover. Use the left analog stick to lean left or right in cover. Hold the left trigger to aim and then press the right trigger to fire. Destroy the marked crate to complete this objective. Tap "Y" to exit cover.
Head toward the next objective marker. Hide behind the wall and, when prompted, hold the left trigger down to aim. Press in on the right analog stick to look through the gun's scope. Destroy the marked targets.
Take cover behind the next wall. Two enemies will appear; defeat them.
Run down the road and turn left at the junction. When you reach the next objective marker, press "Y" to refill your bullets at the ammo box.
Press and hold the "B" button to open a menu. Select the smoke grenade from the menu. Throw a smoke grenade at the next objective marker. When the area fills with smoke, walk into the cloud to hide from the approaching enemy. Toss another grenade further ahead of you. Run through the cloud toward the next objective marker. If you're spotted, the enemy will shoot you.
Head up the ramp into the parking lot. Take the rocket launcher from the Kit Container box. Look over the wall and fire a rocket at the indicated target. When you've destroyed the target, go back down the ramp toward the next objective.
Select your squad when prompted to choose three teammates. You need to pick a gunner, a grenadier and a rifleman. Select the weapons you want your squad to use.
Aim at the next objective marker and then press "Up" to order your squad to go to that location. When they reach the marker, send the squad to the next marker. Press "Down" to call the squad back to your location. Tap "LB" to switch between Ghost mode and Aggressive mode. In Ghost mode, your squad won't attack unless prompted. In Aggressive mode, they'll attack preemptively.
Send the squad to the next marker and then join them behind the yellow striped wall. Take out all the enemies with the help of your squad. When one of your teammates gets injured, tap "Y" to heal him. Alternatively, tap "Up" to order another soldier to do the job.
Go to the next marker. Press "Right" to take control of the armored vehicle. Press "Up" to command the vehicle to move forward. When the vehicle reaches the next marker, tap "Down" to make it stop. Take out the enemies in this area.
Destroy all the enemies in the next area to complete the training mission.