The Mastabas - Secret Beneath Concealed Trapdoor

From the starting point, approach the boarded-up door with the "Danger" sign. As you get closer, a wild dog comes out from between the two buildings ahead on the left. Get a lock on it with pistols and back up shooting.

Then shoot the boards and "Danger" sign.

Enter the building and kill a couple of bats.

It looks like there's nothing here, but wait. There's a cleverly concealed trapdoor in the middle of the floor. Lighting a flare makes it easy to spot. Position Lara facing this tile, standing just outside it, with her back to the entrance.

Press Action to lift the trapdoor.

Climb down the ladder to the bottom of the shaft...

..., where you'll find a large medipack. This is the level's only SECRET (67/70). Climb back out of the pit. Exit and head to the right.

[Mastabas Walkthrough]