Act 2 - Scene 1: Rooftops ( A2S1ROO )

While in the helicopter, you can acquire new gear. You have the option to swap your first gun for the MP9, though this is primarily for testing.

Proceed around the corner and ascend the ladders. A single enemy patrols the upper area. A door beneath the walkway offers an alternate entry.

Enter the hallway and observe two enemies through a window in an adjacent room. You can shoot them directly, stack your team (position your squadmates) on the door to the left, or combine these approaches.

NOTE: Ensure your weapons are silenced. Silenced weapons will not have large silencers visible over the gun barrels.

Continue until you reach a point where you are informed about windows on the exterior of a room. You can send your team into the room while you eliminate the enemy on the walkway by the windows, or you can take out the exterior enemy with a silenced kill and then assist your team as they infiltrate the room. There are only two enemies inside the room.

Proceed to the walkway and climb the ladder. Two enemies are visible and can be sniped as they patrol. Two more enemies will appear; snipe them as well.

After dealing with the snipers, go left and descend a ladder. In the open area, move left. You will find two rappel points: one through glass on the roof, and another on the railing.

First, look over the railing to assess for enemies below.

When ready, have your team breach through the railing while you rappel through the roof point. Once inside, take cover (press the cover button to crouch behind walls or objects) from enemies in the adjacent room.

Toss one or two frag grenades through the doorways and advance. Be aware of the window rappel points, as enemies may have moved outside and could use those ropes. Clear out the room, then proceed outside to eliminate any remaining enemies. Make your way down to the door at the bottom.

Go through the door, but be cautious of a fan on the wall, as enemies can shoot through it.

Stack your team on the door to the left while you move to the door on the right. Snake the door (approach cautiously, peeking around corners), tag both enemies if possible, and then decide whether you or your team will enter first. If you go in first, act as a decoy and immediately pull back while your team clears the room.

Ascend the stairs and go through the door to reach a checkpoint (an auto-save point you restart from on death).