Resident Evil 4/Chapter 5-3

Furnace room
You start in a dark and dusty room with steps on the far side. Check to the left of the steps to get 5000 PTAS and get "Our Plan" from the table at the top of the steps. It's pretty much just a summary of events so far from Saddler's point of view. Open the door on the left to start a cutscene. Ada and Krauser seem to be plotting against you, though Krauser is very suspicious of Ada.

You're now in a hallway with steps leading down. Follow the path to the corner to get find Shotgun Shells, then go back and take the steps down to the lower level, defeating a soldiers or two that may come through the door. Shoot the sparkling object in the skylight to the north to get an emerald. There is a Green Herb at the bottom of the stairs.

Go through the door and fight the soldiers among the the large furnaces. Watch for archers on the left and a soldier with a shield.

At the end of the aisle you can go three ways. To the right is a storeroom with 3000 PTAS and a Flash Grenade. To the left, at the top of some steps, is a small office with possibly a holdout soldier. Get Shotgun Shells from a desk and Rifle Ammo from a locker here. Go back and through the remaining door at the end of the aisle.

Power Plant
Go through a hall and the door at the end into a lager room with large turbines. Most fo the room is fenced off though. Grab the Shotgun Shells from thr floor and take the lift to the upper level.

Now it's time for QTE hell part 1. It's a long cutscene where you dual Krauser with knives. But every so often you have to do one of those button combos to do a saving move as the two of you alternately talk and fight. There are six of them strung together and they are randomized. After these there is a part where Krauser jumps on top of you and you must press first one button, then another quickly to push him off. There is a continue somewhere near the middle, so if you get close to then end you won't have to start over from the beginning.

Meanwhile there are a few revelations in the cutscene part. Krauser is another acquaintance of yours but you thought he was killed several years ago. He's the one who kidnapped Ashley in the first place, but it was a way of gaining Saddler's trust. His goal is to get in deep enough with Los Illuminados to get the "sample" for Umbrella Corp. Finally Ada appears and turns on Krauser. He does a superhuman jump to escape, so it appears he may be getting power from the parasites as well. Ada leaves and you get a call from Saddler. He says that now that you've met an "old friend" here, he's going to continue being a good host and introduce you to "it".

You were probably watching for button presses instead of what was happening in the fight, so chances are that you didn't notice that you went over a ledge at some point. So you're going to be really temped to climb the ladder here, but that just takes you back to where the fight starts. Instead, jump down to the floor and go through the door.

Laser hall
Now it's time for QTE hell part 2. You enter a room and an automatic door opens as you approach. This reveals a long hallway and as you step forward lasers are activated. You must pass a series of barriers and they get increasingly difficult.

First, there are three beams; wait for the horizontal beam to start upward and the two vertical ones to separate, then run through. Be sure not to touch the beams since they are instantly fatal.

Second, there are four beams; the pattern is more complicated this time so take a moment to learn it. Wait for the two horizontal beams to start upward and move when the diagonal beams go vertical.

Third, there is a bunch of horizontal lasers that come toward you and you must press the buttons on the screen to do a saving move.

Fourth, you approach some lasers that seem to be malfunctioning. You need to do one saving move when they come on suddenly and another when they come toward you.

You finally reach the end but it’s not safe to breath yet. When you press the button to unlock the door more lasers approach and you must press the buttons at the right moment, just before they reach you, to execute the saving move.

The button combo is always the same in this hall, which is fortunate because there would not be enough time to react if you needed to actually get the combo from the screen.

The next room seems to be Saddler's personal relaxation room. Get the Elegant Headdress by shooting the sparkling object from the beam across the ceiling, then get the Emerald from the throne. You can try sitting there if you want but nothing happens.

Go behind the throne and take the elevator.

Cavern Access
You enter a tunnel with cement walls that turns to bare rock as you go down some steps. Get a Green Herb and an Emerald under the stairs. Continue down the passage to find the Merchant and a typewriter on the right. Pick up "Luis' Memo 4" here; Luis summarizes what he knows about Las Plagas, comparing them to social insects. He also regrets working for Saddler, but his thirst for knowledge blinded him to Saddler's evil nature.

Go into the cage behind the Merchant and get Magnum Ammo and a Red Herb. Then continue down the passage and through the door at the end.