Colosseum - Northwest Corner Room - Secret #3

After dealing with Pierre and Leo, proceed to the northwest corner room, near the collapsed seating area.

Kill 2 more bats (22-23) in the anteroom, then enter the inner room.

At the top, behind a timed door, is a secret. This zoomed-out view gives an overview. Stepping on the outlined in tile causes the secret door to open. Once Lara steps off this tile, the door only stays open for a few seconds, so we'll be doing a series of quick jumps up the pillars to get there in time. We'll break it down step by step, below. This sequence is also shown in a short video on my YouTube channel.

First, make sure the volume is up so you can hear the door open and close above (not essential but helpful). Position Lara next to the tallest pillar, squarely facing the right side of the low block ahead, with her left foot just touching the back right corner of the the pillar's base. (Even without the drawn outline, it's fairly easy to see the edges of the tile that triggers the door.)

Hop back once. (The timer will start, and the door will soon close, but that's OK.) Save the game if you like.

Now, take a running jump, passing over the tile that opens the door...

...to land on the near right corner of the low block. While Lara is in the air, release Forward, but continue holding Jump. As she lands on the low block, immediately press Right to side flip onto the next pillar, then Back...

...then Left, then Forward (while holding Jump the whole time). If you've lined it up correctly she'll do a fluid series of jumps, ending up on the ledge in front of the secret door.

It should still be open, so you can run on through.

This is SECRET #3, which consists of the MAGNUMS (8), 2 large medi packs (9-10), and some Uzi ammo (11). Take everything and exit. (The door opens automatically.)

Before descending, take a running jump to the ledge on the left. Use the switch to open a door in the northeast corner of the arena. To get down, safety drop to the platform below. Then hop down to the floor.

[Colosseum Walkthrough]