After picking up the JERRYCAN near the gas pumps, head back the way you came and go between the two buildings where the first dog emerged.

Approach the door of the building on the left and press Action to kick it open.

Enter and pick up revolver ammo in one corner. The trapdoor in this room is much more obvious. Stand near the handle and press Action to open it.

Drop into the tunnel, advance a few steps, and kill a wild dog that approaches from around the next corner. The shotgun works well in close quarters.

Follow the tunnel. At the split, go left (east).

Just ahead, the tunnel slopes upward, takes a turn to the right, then straightens out.

When you pass this point, 2 more dogs charge up the stairs toward you. Shoot them and continue to the room below.

Pick up normal arrows and a small medipack from the floor.

Now examine the 3 golden lion heads mounted on the walls. Each has a large gem in its mouth. You must shoot all 3 gems to open the door at the top of the ramp.

There's no need to waste special ammo to do this. Just stand facing one of the lion's heads and jump up and down while shooting. It shouldn't take long to shatter the gem. Repeat this for the other two gems.

When all of the gems are broken, the door opens and and 2 mummies emerge.

You can destroy both with a single grenade or explosive arrow. (Other weapons are ineffective.)

Then go into the alcove and pick up the SMALL WATERSKIN.

[Mastabas Walkthrough]