In addition to physically slapping your characters if they get too close to him, the pharaoh's main attacks are a thunderclap and foot stomp that can injure your characters and knock them down. When he spreads his arms wide...

...or lifts his foot threateningly...

...try to move out of the way. Run/roll onto a clear area...

...turn to face the Pharaoh, and continue shooting as you back away.

If you're too close when he claps or stomps, the shockwave will do damage and knock you down—possibly onto a ice vent. So try not to let that happen.

Continue to evade the boss by rolling past him, taking up a position in a safe spot, and shooting as he approaches. At this point, there's no need to go past the big gears. Just move back and forth along one side of the room as you fight.

When you have reduced the Pharaoh's health bar by a third...

...he vanishes in a cloud of smoke. During the brief lull after he disappears, you can pick up health and ammo if you need it.

[Part 1 | Part 3 | Return to the Tomb of the Pharaoh Walkthrough]