Act 4 - Scene 4: Monorail ( A4S4MON )

Open the door, look right, and send your team to the cover of a white stand.

Use your scope to look left for an enemy moving toward your flank and attempt to kill him.

Sprint to a blue newspaper machine and direct your team to go down the stairway attached to the building you need to enter, which enemies are pouring down.

Provide support while your team ascends the stairs, focusing on preventing enemies from taking the turret.

Once your team is at the stairs, sprint over to them, being mindful of shotgun enemies on your left.

Have your team go up the stairs first, then follow them up the ladder, watching for enemies that may come down.

Upon reaching the roof and the checkpoint (an auto-save point you restart from on death), proceed right to the skylight.

Look down and position your team on the points, but wait to command them to descend.

Headshot (a shot that lands on the enemy's head, usually an instant kill) any shield enemies and consider using a frag grenade, being careful not to hit yourself.

Send your team down, then follow, taking cover behind the bar with them to engage enemies in the open.

When the area appears clear, go through the door on the right, then snake the next door and tag the gunner.

Send your team through, position them on cover in the corner of the wall, and then take the turret.

Once the area is clear, go right to a door.

Snake the door to observe two shields on patrol; they will eventually enter the room on your left.

Either wait in that room or tell your team to open and frag the door, using thermal scan (a HUD (heads-up display — the on-screen icons showing health, ammo and the minimap) element showing heat signatures) to locate enemies.

Enter the room with the phones for a checkpoint.

Snake both doors and stack your team on the door on the left.

Open the door on the right and kill the enemy directly in front of it yourself.

Stay behind the cover of the doorway and patiently eliminate targets that move around the turret.

Call your team to cover within your sight if needed.

As the area becomes clearer, advance your team and follow to ensure the area is secure.

Near the turret at the back, watch the stairs for descending enemies, including two shields.

Carefully position your team on the midway point of the stairs.

Direct your team to deploy smoke (press the left button) or toss smoke grenades yourself.

Lay at least three smoke grenades: one near the top, another closer to the top, and one at the very top of the stairs.

Send your team to the top of the stairs.

If your team is hesitant to attack, run up, activate your thermal vision, and engage the four enemies near the bomb and the one by himself.

Avoid using frag grenades in this section.

Send your team up near the bomb and watch the windows by the bomb for rappelling enemies, engaging them as they appear.

Once the area is clear, go down the ramp to check the platform for hidden enemies.

Return and direct Mike to the bomb and Jung to a computer.

Watch the window for three rappelling enemies and shoot them to complete the objective.

Watch the subsequent events unfold and have your team use rappel lines to reach the chopper on the roof to end the mission.