Jump across the gap onto the rotating gear on the right, taking care to avoid the snowmaking machine at its hub if possible. (If necessary you can hang from the edge of the gear to avoid being hit by the blast of cold.) Move around the gear counterclockwise to collect the gems.

NOTE: There's a red skull off to the right. It's not too difficult to retrieve it, but if you prefer, you can wait until you've deactivated the traps, as described below, and then backtrack for the skull.

Then jump onto the smaller gear off to the right. Hop onto the adjacent gear and move around it clockwise to collect the red skull (1/5).

Move back to the other small gear and jump from there to the larger gear on the lower left. Again, move around it clockwise to avoid the snow jets as you pick up the gems.

Jump onto the smaller gear directly downscreen. In the single-player or 2-player co-op game, there are 2 Marks of Set sitting on the larger gear on the left. Wait for the gear to rotate until the Marks are lined up ahead of you. Then shoot the Eye of Horus switch to halt the gear.

Now you can use the Staff to destroy both Marks at the same time.

In 4-player co-op or 3-player with 2 Egyptian gods there are 3 Marks of Set. Shoot the switch to stop the gear from rotating. Then have one Egyptian destroy 2 marks, while the other destroys the third.

Destroying the Marks deactivates the ice vents on the ledge to the left.

Jump over there now.

In the single-player game use the Staff of Osiris to raise a column so you can retrieve the HIGH POWERED RIFLE on the ledge above.

In co-op mode have one player jump on another's shield to reach the weapon.

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