This walkthrough is meant as a general guide only. It may not include every pickup or secret. There may also be alternative ways of approaching situations within the game.
Get ready because this level begins with Lara sliding down a slope with a spiked boulder in fast pursuit. As you are sliding, jump and curve to the right so that you land sliding at the rightmost part of the slope. [tip: you may have to "jump and curve" a couple of times to get to the rightmost side of the chute.] At the end of the slope, take one last jump, curving to the right to land in the alcove on the right. Turn right and take a few steps into the alcove to avoid the backlash from the rolling boulder (but not too far as there is a fire tile at the end of the alcove). Facing west, take a standing jump over the fire tile and grab the block hidden in the darkness. Pull up, light a flare (or shoot pistols to save on flares) and drop into the corridor below. Turn right and right again into another alcove and pickup three Grenade Gun Ammo and Grenade Gun. Reverse roll, turn right and climb the block. Drop down and push the floor lever on the right. [Note: This lever opens a gate to the pink corridor in the Labyrinth Maze (Area 4)] Turn right, climb the block, drop and head to the end of the corridor. Turn left, climb the block and take a standing jump over the fire tile. Face the pole (east) and take a standing jump over the hole to the alcove on the other side.
Jump up and grab the edge of the crawlspace and pull up. Immediately crawl to the left, light a flare and pickup the Hand of Sirius in the alcove. Crawl backwards, continue east, then north through the semi-lit crawlspace. Reverse, crawl out, reverse roll and immediately arm weapons. Shoot the ninja in the room and pickup the Crossbow he leaves behind. Head to the back of the room (north) and pickup three Crossbow Ammo, Revolver and Revolver Ammo. [Note: At this point, you could bypass the Lower Egyptian Room (Area 3) by dropping into a waterhole situated on the south side of the room. However, you would miss a pickup, enemy and that part of the level.] Turn around and head back through the crawlspace in the south wall. Climb out, reverse roll and walk to face the pole.
Take a standing jump and grab the pole. Slide down, backflip and arm weapons. Shoot the ninja in the room. Pickup the large medipack in the south/east corner. Place the Hand of Sirius in the wall receptacle in south/west corner, opening the first gate with the green corridor.
Push the floor lever located in north/east corner, opening a second gate in the green corridor.
[Note: There are actually two routes that can be taken to complete the next two areas, one through the green corridor and one through the pink. If choosing the green corridor, you will go through the next two levels in reverse order and enter the maze through the EXIT, instead of the Pool at the start (see maze map). IF YOU ENTER THE MAZE FROM THE BACK (EXIT), DO NOT PUSH THE TWO LEVERS INSIDE the Labyrinth Maze (Area 4). Doing so will CLOSE (NOT OPEN) the gates and permanently lock you in the maze, forcing you to reload a savegame to continue. The walkthrough is written taking the pink corridor route.]
Facing the east wall, head through the gate on the left with the pink corridor. Drop into the water, swim through the corridor and surface. Pickup the Revolver and three Revolver Ammo in the room. Climb the block into the opening in the east wall and drop down the other side. Follow the corridor around, arm weapons and shoot the ninja in the corridor. Pickup the small medipack he leaves behind. Turn to face north, climb the block and arm weapons. Shoot the ninja appearing in the corridor below. Drop to the other side and follow the corridor around. Pickup the large medipack at the end of the corridor. Turn left (west) and climb the block. Drop down the other side and push floor lever #1, opening the first of two exit gates in the maze. Climb back out, drop into the corridor and turn right (south). Head straight down the corridor, turn right just before the wall and climb the block on the right (west). Follow the small corridor as it curves left. Take a running jump and grab (to change trajectory) over the small pit, drop down at the end and pickup the small medipack. Reverse roll, climb out and take another running jump and grab over the pit. Immediately turn left (north) and climb the block. Drop down two blocks and head left around to the opening in the north/west corner. Climb the block, walk to the edge, angle left and take a standing jump and grab (to change trajectory) over the pit to the next block. Drop down and pickup a large medipack and Cartouche Piece 1. Reverse roll and climb the block. Walk to the edge, angle right and take a standing jump and grab (to change trajectory) to the next block. Drop down and turn right. Climb two blocks south and turn left (east). Drop down two blocks and turn left (north) down the corridor. Turn right (east) down the first corridor and climb the block ahead. Angle left, drop down and push floor lever #2. Reverse roll, climb out and turn left (east). Drop down and arm weapons. Shoot the ninja appearing from the south and pickup the small medipack in the pit. Face south and climb the block. Drop down and climb the block ahead. Turn left (east) and exit the maze.
Head into the Main Atrium, turn right and enter the alcove on the right (south/west corner). Angle left and take a standing jump and grab the block. Pull up, face west and take a running jump and grab the ledge on the column ahead. Shimmy right and grab the ladder on the column. Climb down to the bottom and walk around the column to the corner of the south/west tile (see screenshot), taking note of the toxic water beyond the tiles. Angle left and take a running jump to the safe tile in the far south/west corner within the toxic water. Turn right and take a running jump to the safe tile behind the column. Pickup the Hand of Orion. Turn around and take a running jump back to the safe tile in the water. Angle left and take a running jump back to the safe tiles around the central column. Go around the column and climb back up the ladder to the top. Turn around, angle right and take a running jump to the block ahead. Turn left and take a standing jump to the entrance into the main atrium. Turn left and enter the second alcove on the left. Place the Hand of Orion into the wall receptacle and enter through the newly opened gate.
Climb the ladder until you reach the dark green patterned tiles on the wall. Backflip to the ledge behind. Turn around and run straight forward to the end of the room. Boulders will fall to either side but if you run straight and stay on the path with the dark green tiles, you will avoid them. Turn right and head around the boulder, into the next room. Drop down 3 rows of blocks and turn left. Drop down 3 more rows and enter the next room. Turn right, head around the ledge and climb into the entrance on the right (south). Pickup the Uzis in the south/east corner. Reverse roll, exit the room and turn right. Head around the perimeter of the room to the north/east corner. Go down the stairs and turn left to face the entrance to a red room.
Take a running jump over the toxic water and pickup the Ba Cartouche at the end of the ledge. Reverse roll, walk to the middle of the ledge and turn right (south). Take a running jump over the water to the ledge ahead. Turn left, jump up and grab the climbable block above. Shift to the left, around the block and drop to the ledge with the lever. Push the floor lever, reverse roll and return to grab the climbable block. Shift right around the block and drop to the ledge on the other side. Turn left (north) and take a running jump back over the water. Turn right, take a running jump and grab (to change trajectory) over the water and through the door to exit.
Head forward and climb the three blocks ahead into a large brown atrium. Climb the ledges on the central structure and head to the back. Turn around (face west) and place the Ba Cartouche in the wall receptacle. Head back around to the other side and enter the newly opened gate. Climb the block and pickup the Eye Piece in the alcove. Reverse roll, drop down and exit through the corridor ahead (west wall).
Turn left (south), climb the block and head up through the mauve corridor. Climb the last block and run to the end of the room. Turn right and climb into the room on the right (south). Turn right (west) and head down through a corridor with "eyes". Into the next room, make a hairpin turn left and climb into a new area (east). Turn right (south) and head down the corridor with many pillars to a pool area. Head straight, past the first pool to the back of the second pool and turn left (east). Walk onto the tile in front of the wall receptacle opening a gate in the room. Turn left (north) and head down the perimeter in between the two pools. Turn right (east) and climb into the opening to the next room.
[Note: DO NOT drop into the small pool in this room without having BOTH Cartouche pieces in inventory. Otherwise, you will have to reload a savegame, as there is no way out of the pool without them.]
Head to the north/east corner of the central structure and take a standing jump to the upper block. Climb the next block and turn around. Angle to face north/west and take a standing jump up to the top. Pickup Cartouche Piece 2 and climb back down. Drop into the small pool in the east side of the room and swim north through the opening into another room. Reverse roll, surface and climb out. Climb to the next ledge, and head north to the back of the room. Combine the two Cartouche Pieces to create a Ba Cartouche and place into the wall receptacle, opening both the gate on the central structure and an underwater gate below. Reverse roll and take a running jump to the central structure. Pickup the second Eye Piece, reverse roll and drop into the water. Swim through the gate and surface at the end. Turn left (west) and pull up out of the water. Take a standing jump over the slope. Approach the gate and it will open automatically. Head back through the corridor with the "eyes", turn right at the second last block and climb two blocks up the structure ahead. Turn right, drop down and push the floor lever. Turn left, climb out and drop down to the floor. Exit through the door in the west wall back into the Main Atrium.
Head to the north/west corner of the Main Atrium and climb the ledge. Push the floor lever, opening two gates in the next area. Turn left, drop down and enter the room on the right (west). Combine the two Eye Pieces to create the Eye of Horus and place into the door receptacle ahead. Climb the block and the pink and white stairway and turn left. Drop into the water and swim left. Swim down to the north/east corner into an underwater corridor. Swim north and surface at the end. Swim right (east) and pull out of the water. Head around the perimeter of the pool into the room to the west. Pickup 3 sets of Uzi ammo on the left side of the room and 2 sets of Uzi ammo on the right. Arm weapons and run west to the back of the room to the Lara photo/mural at the end. Reverse roll and take out 15 ninjas appearing from the left and right of the room. Push the two floor levers, reverse roll and head east, back to the pool in the previous area.
Face north and get ready for a tight swim. Dive down and swim through the brown underwater corridor and turn right. Once in the checkered room, swim up and slightly to the left there is an entrance to a set of underwater corridors. Swim through, follow the corridor around and when it branches into 3 routes, take the middle route, slightly to the right and to the back of the alcove. Turn left and swim to the end. Pickup the Hand of Sirius, reverse roll and swim forward. Swim right, then left and out of the small room. Angle left and exit the checkered area. Swim through the brown corridor, turn left and surface for air. Pull out of the water on the east side of the pool and re-enter the large room to the west. In a small alcove on the south wall, is a wall receptacle. Place the Hand of Sirius in the receptacle, reverse roll and exit the alcove. Turn right (east), exit the large room and drop back into the pool. Swim north through the brown underwater corridor to the end and surface. Pull out of the water on the east side of the pool and enter the large room to the west. Look familiar? Yeah, messed me up for a second there, too. :) Head west towards the "other" Lara photo/mural and the level ends.