Colosseum - Emperor's Box (Again) and Level Exit

Once you're inside the EMPEROR'S BOX, head for the back of the room. Go through the tall door you opened using the switch in the northeast corner room.

Here you'll find another small medi pack (14) (and a save crystal if you're playing New Game+).

Return to the balcony. There are now 2 more gorillas (25-26)* running around down in the arena.

NOTE: If you've already unlocked "Kong's Fate" and just need "Ave, Lara!," go ahead and shoot the last 3 gorillas from the balcony. Assuming you already killed seven arena animals on your first visit to the EMPEROR'S BOX (here), that will make 10, and the achievement should unlock. If you haven't unlocked "Kong's Fate" yet, shoot two gorillas from the balcony, leaving one alive, then save the game. Lure the gorilla to the high point and kill it, as shown here. Then reload the save you just made and kill the last gorilla from the balcony to unlock "Ave, Lara!"

When you're ready to move on to the next level, use the RUSTY KEY in the keyhole to open the gate (on the right side of the room if Lara's back is to the balcony). Jump into the water and swim down...

...then forward.

Just ahead, the tunnel widens...

...and there are square metal grates on each side. Between them is a small, square opening in the ceiling, where you can climb out of the water Go quickly to avoid the crocodile (27)...

...which you can then kill from inside this small room if you want to. You may need to take a swim to draw it closer, or just jump over the opening a few times to get its attention. Pull the switch to open the gate at the far end of the flooded tunnel.

Jump in the water and swim through to exit the level.

[Colosseum Walkthrough]