Get back on the bike and drive down into the hole next to the stairs. It's quite a drop, but Lara will be all right.

Note the medi pack and machines behind the fence. You'll get there soon.

If you want all the kills, dismount here and walk into the tunnel ahead. As long as you proceed on foot, an orange-suited worker appears and the barrel ignites. If you stay on the quad bike, neither of these things happen. Kill the worker...

...and then shoot a third sniper on the ledge on the far side of the pit if you like.

Now, get on the quad bike again and jump across the pit to the ledge where the third sniper was standing. This jump is a little tricky. Start on the downslope just beyond the barrel.

Hold the brake, rev the engine...

...and then release the brake to surge forward, and you should make it with no problem. (If you didn't shoot the sniper before, run him over now.)

Dismount and pick up the MP5 clips the sniper dropped.

Follow the passageway on the right to an opening with a chain link fence overlooking the pit. Here you'll find a pair of grenades.

NOTE: If after getting the grenades you go up the ramp and slide back down into the tunnel with the flaming barrel, you can still get back to the other side. Face the pit and walk to the left side of the opening. Beyond some uneven rocks is a small, flat ledge. Slide down onto it then take a running jump to the walkway with the key card, shown in this screenshot.

Come back to the quad bike and pull the switch on the orange support column to open a gate across the pit.

Pick up the DRILL ACTIVATOR CARD.

Then get back on the bike, ride forward along the walkway where the card was, jump across the gap, and continue through the gate you just opened.

[Part 2 | Return to the Shakespeare Cliff Walkthrough]