Leap to the chute and then leap to the edge of construction behind you. Jump to grab the edge above, jump two times and you are on the top. Jump to track - way.
Go inside the tunnel. Jump to the slant stone on the right, then leap to the shelf on the left. Jump to the two shelves above and leap to the shelf in the opposite wall. Jump again. You're on the top.
Now you must defeat Kold and Johnson. Push the direction keys in the proper order. After the fight take SMGs.
Go to the right, you will find green box. Push it on the other side of the room, under the lowest shelf. Jump to the box and then on the shelf. Climb on the two stone blocks above and leap to the bigger shelf. Turn the wall round and jump to the another stone shelf. Take large first-aid kit.
Jump down on the ground and go to the other side of the room. Find next green box and push it to the left, under the rocks. Jump to the box and after that leap to the lower shelf. Jump to the upper shelf, then leap to grab the edge above. Move to the right. Slide down and go to the end of the shelf.
Jump to the pyramid and leap to the back to grab the edge of the niche. Pick up SMG's ammo and large first-aid kit.
Jump to the pyramid and then leap to the stone shelf near the niche. Climb on the top of the rock.
Now jump to the salient columns, which are looking like huge thorns. Your task is to leap to the six special column - they have different flourishes from the others. You must do it quickly otherwise you will fall down.
After that jump to the niche in the centre part of pyramid. Switch the lever - the gate will open.
Slide down and go inside the pyramid.