City of Vilcabamba - Room with Stairs & Room with Skulls
"Kon-Tiqsi-Wiraqucha" Achievement/Trophy
Now, face away from the room with the two doors and wooden trough. Ahead on the right is carved stone door with a switch next to it. Use the switch to open the door.
Enter and climb the stairs to a small doorway overlooking the corridor below.
Take a running jump across the gap to the opposite opening. If you're achievement/trophy hunting, save the game here.
The next room has a floating walkway made of 2 break-away tiles (3-4/51) and a raised alcove surrounded by skulls. The Kon-Tiqsi-Wiraqucha achievement/trophy requires you to "Go in to get the gold idol and exit through the same window." After Us the Deluge! wants you to "Make all shuttered [sic] floor panels crash on a single walkthrough." Here's how to do both:
Walk to the edge of the opening. Then jump forward to land on the second cracked tile. It collapses, dropping Lara to the floor, but the first tile remains intact. Don't worry about the medi pack in the alcove for now.
Locate the darker movable block in the wall below the ledge. Position Lara against it and hold Action. She'll go into a crouch, showing that she's ready to pull or push the block. Press Forward/Up to push it. Repeat this several times to push the block into the next room.
Kill a bat (18) and move past the block. Vault onto the low platform at the back of the room...
...and collect a SILVER KEY (7)...
...and GOLD IDOL (8) from the alcoves on each side. Return to the movable block and use it to climb onto the ledge above.
(There's a save crystal here in New Game+.) Go to the left side of the L-shaped platform, killing 2 bats (19-20) that drop from the ceiling. Pick up the large medi pack (9) in the dark corner to the left of the window opening. Do not climb out this window. Instead, drop back down to the lower level.
Push the movable block back into the other room.
Use it to reach the alcove with the large medi pack (9) on the wall made of skulls.
You might want to save again here. Then take a running jump to grab the edge of the intact break-away tile.
The tile won't shatter as long as Lara is hanging.
Pull up to stand on top of it. Then, before it can crumble away, immediately jump forward to grab the windowsill. Pull up to unlock the achievement, then drop down into the hallway below.
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