The Lost City - Battling Trinity on the Long, Curved Walkway (Part 1)

You begin this sequence crouched behind the fallen statue where Lara took cover during the cutscene. At this point, I prefer to switch from bow to rifle, since the enemies begin to appear faster and in larger numbers, but by all means do what works for you.

Kill the first 3 Trinity soldiers, who take up positions ahead, left, and right.

If they start throwing grenades, scramble for cover behind the metal thingy ahead on the left.

Then finish them off before they can do more damage.

When you've killed this trio, take a minute to search their bodies and and reload. The next group of enemies won't spawn until you move forward to the ice boulder in the middle of the path.

This next group—3 regular soldiers and a man with a heavy shield—also come out of alcoves on the left. You may be able to take out a couple of them by shooting the jars of Greek fire nearby.

Like so.

If any of the survivors start throwing grenades, fall back to one of the cover positions you passed earlier...

...and retaliate with your own grenades.

Four more men arrive to back up the first group. Stay behind cover if possible and pick them off as they approach.

Among them is that one crazy guy with the backpack who always seems intent on getting up in Lara's face.

If he comes too close, switch to the shotgun and take care of him.

As long as you don't climb the steps ahead, you're safe for now. Take time to reload, craft special ammo, and loot all the bodies. You'll also find mushrooms in a couple of the alcoves on the left side of the walkway, and herbs and grenade arrows in another.