City of the Serpent – Defeat Trinity

You begin the fight crouched behind a low wooden barrier. A pair of Trinity soldiers appears just shead.

Try to take them out quickly. If they destroy your cover or start throwing grenades before you can kill them, move up to the solid stone barrier on the left.

A third man, comes through the doorway at the top of the slope and moves behind cover. To save ammo, shoot the red jar to the left of the barrier.

One well-placed bullet or arrow should set it off, killing the soldier. Search the bodies and loot the supply container in the far right corner before entering the next area.

NOTE: Even though many of the bodies glow in survival instinct, you can only actually search the 3 soldiers you just killed. They carry ammo, health, gold, and other minor resources.

As you move through the passageway into the next area, a short cutscene plays.

Lara and several Yaaxil rush in. Most of them are mowed down by the hovering helicopter, but Lara manages to take cover behind a broken stone wall. There are 2 enemies ahead.

Shoot the explosive barrel on the ledge to take out the sniper next to it.

Then deal with the other man, who may take a position out in the open on the right or move behind the wooden barrier on the left.

If you have stockpiled a lot of Focus and Endurance herbs, you may want to use some of each before moving forward into the next area, where you'll come up against 5 more soldiers and Commander Rourke, shooting from inside a tank wedged in the doorway at the top of the slope. (If you have limited resources, save them for the upcoming boss fight.) Move out past the corner and take cover behind the nearest of several low stone wall. If any of the men ahead starts throwing grenades, you'll need to move back out of the way, but if you're quick, they won't have time to do this.

The first 2 enemies advance down the slope toward you.

If Focus is active, you can probably take them both out with headshots...

...before they do too much damage.

Your Yaaxil allies surge forward into the fray. They don't stand a chance against Rourke's tank, but they'll buy you a few moments to heal and reload. Remember to release Aim to duck down behind the wall so you don't take fire.

As the next 3 enemies appear at the top of the slope, try to shoot the explosive jar on the left. This should take out 2 of them.

Then shoot the urn on the jar on the far right to kill the last man.

Or, to conserve ammo, instead run forward as the Yaaxil do. Take cover behind the next low wall on the left.

Pick up the red gas can...

...and hold Alternate Fire (Middle Mouse/R1/RB) to combine it with cloth from your inventory to make a petrol bomb...

...and toss it over the wall at the second group of enemies.

Once you've killed them all, a cutscene kicks in. Rourke loses his cool and starts shooting frantically at the approaching Yaaxil. The Crimson Fire is not one to run from a little machine gun fire. She leaps up onto the tank and shows him how her people deal with evil interlopers.

Search the bodies for supplies. Then climb the ledges to the right of the tank...

...to reach the City of the Serpent Base Camp. Fast Travel is disabled, but you can spend any unused Skill Points, craft weapon upgrades, and change outfits if you like. At this point, every outfit you've unlocked should be available. There's also a resource container and some wood for arrows off to the left.