Go through the door and use your special skill to get to the other side of the spiked pit.
Get across the top of the pyramid to its other side and jump across another spiked trap. One of the archaeologists will appear.
Head to the right and down the pyramid. After getting down a very long ladder, start going to the right until you see a Cave Tour board. Right behind it on the wall there's the Ankh cross. Take it and head to the upper part of the pyramid. Jump across the spiked pit there and find a locked door to the chamber with the sarcophagus behind.
Put the Ankh into the Ankh Recess. Go through the door and stand on the pressure plate beside which there's a rabbit image to open a passage in another part of the pyramid. Head there with the two other characters and jump to the chamber with animal images. They will be imprisoned there.
Stand on the pressure plate with the snake image with one of the imprisoned characters and with the second on the one with the lion image. A door will open in the room where the adventurer is.
Head through the newly opened door with the adventurer and use her special skill to pull yourself to the upper level. Now stand on the bird pressure plate with one of the characters below (remember to keep the second one away from any plates) to make the spikes slow down, allowing the adventurer to cross them to the other side.
Now stand on the snake pressure plate with one of your heroes and switch back to the adventurer. She will be able to safely jump down. Before moving to the left, try avoiding the pressure plate with the image of one of the characters and spikes hanging above it. Follow this rule in the further part of the pyramid as well, as otherwise the imprisoned characters may be killed by the dropping ceiling. Move a bit to the left, switch to the imprisoned heroes and use one of them to stand on the lion pressure plate. Move further to the left with the adventurer and jump left while avoiding another ceiling trap.
Stand on the bird and jackal pressure plates to create a path to the right for the adventurer, at the end of which she will be able to use her skill to avoid the spikes of the second trap.
Before the entrance to the sarcophagus chamber, avoid the pressure plate which activates a ceiling trap.
Stand on the snake and eagle plates with the imprisoned characters and start pushing the sarcophagus to the right with the adventurer. When it presses the pressure plate a door will open, so push it to the lower level and further left to the elevator. The sarcophagus will start going down.
Stand on the jackal pressure plate with one of the imprisoned characters. From now on you will have to be very fast with the next steps. Jump down onto the sarcophagus with the adventurer and stand on the plate on its left side. When the sarcophagus starts moving, run below to the right and afterwards left.
Run below the moving sarcophagus and jump onto the pressure plate on the left side of the elevator. At the same time, use one of the imprisoned heroes to push down the jackal pressure plate (remember to keep the second character away from any others!). When the sarcophagus rides below, run to the right with the adventurer and jump down. Quickly switch to the imprisoned characters and press the lion plate. Run through the opened door with the adventurer, move below the sarcophagus and once again stand on the plate on the left side from it.
Jump onto the sarcophagus with the adventurer and pull it to the right. Afterwards jump to its other side and push to the archaeologist. Listen to his monologue and start pushing it further, pushing the archaeologist onto the spikes and further to the right until the floor crumbles.
The adventurer will be trapped as well. Go left and stand on sail plate. Use the two other characters to push the snake and jackal plates. A green fire should be lit. Now step onto the Ankh symbol with the adventurer and the lion and bird symbols with the two others. Another green fire will be lit. Stand on the last symbol with the adventurer and on the lion and jackal with the two others. The two prisoners will be able to leave the chamber through the floor.
Push the fallen boulder to the left so that it falls where the adventurer is. Switch to her and push the boulder onto the pressure plate, climb above and go right along the tour route. Stand on the platform with all three characters and the passage will open.