At the top of the stairs beyond the sliding block traps is a steep tunnel. The vibrations from Seth's almighty tantrum have begun to knock the place down. Advance one or two steps beyond the doorway.

Then wait as a huge stone block smashes down just to your right.

If you examine the ceiling, you'll notice that certain tiles have skulls carved into them. These are the ones that collapse if you get too close. If you move cautiously, you can avoid them or at least make sure to run beneath them quickly so Lara doesn't get crushed.

To get through this first section, step onto the next tile directly ahead, stop, and wait...

...for 2 more blocks to fall, one directly in front of you and on the left. Then advance up the right side of the slope.

Take a running jump across the spike pit to grab the opposite edge.

Pull up.

Move partway up the next slope then to the left, between the two columns...

...to avoid another falling block. Continue up the slope along the left side.

Take another running jump across the next pit to grab either the left or middle of the opposite side.

If you grab the left side, traverse to the middle. Then pull up.

For this next section, avoid the left side of the tunnel, where there are more falling blocks. Instead, advance up the right side of the slope to the third pit.

Take a running jump across the pit to grab the opposite edge but don't pull up yet.

Look up to spot 2 ceiling tiles with skulls directly above. To avoid being crushed, either pull up and immediately run forward out of the way (not shown)...

...or traverse to the left side of the ledge before pulling up.

Wait for the block on Lara's right to smash down.

Move around that block to the middle of the slope, avoiding the area beneath the skull tile just ahead on the left. Now continue up the ramp to finish the level and the game.

[Temple of Horus Walkthrough]