Quake E3M5: Wind Tunnels Walkthrough (All Secrets)
Youtube Walkthrough: Wind Tunnels (E3M5) Video Walkthrough (All Secrets)
Rumble Walkthrough: Wind Tunnels (E3M5) Video Walkthrough (All Secrets)
The Wind Tunnels are a rather unique level because you'll be moving around from part to part by using tunnels. You'll need to jump up to travel through a tunnel, as you fly through them you'll move really quick and it will be hard to tell what you're doing and where you're doing.
After riding through the first tunnel you'll find yourself in the primary room, you'll be returning here multiple times throughout. Start by defeating all enemies here then using the only available tunnel to continue. The first tunnel takes you to a medium sized room with a few knights and a Quad Damage on a ledge that you can't reach yet.
Defeat all the enemies in this room and then work your way through the hallway, grab Secret #1 so you can get the Quad Damage. On the other side of the hallway where you found Secret #1 you'll find a small room with a button. You'll be coming back to this room in a little bit and there's an important quirk when we do.
For now jump down into the hole that opens when you hit the button and continue through the water back to the primary room. A new wind tunnel will be open now so take that one, it will take you to a medium sized room that has platforms surrounded by water. Grab Secret #2 from this area before you jump into the next wind tunnel.
You'll be spit into another nearby tunnel, follow that to the end and drop down into a pool of water... Remember this room? This is where the important quirk takes place. In order to get the Quad Damage on the cat walk in the next room - you need to go through this wind tunnel in a very specific way.
Face the previous drop down that we took like you see here.
Hold Forward + Left while spamming jump when you reach the next room.
Tip: To get the Quad Damage on top of the catwalk in the room with the traps you will need to hold forward + Left (or forward + Right) while flying through the tunnel. If you do this while flying through the tunnel you will land on the catwalk in the other room. Check out my How to Reach Quad Damage on Catwalk in Wind Tunnels Youtube Video if you'd like more of an explanation.
This Quad Damage is not a secret so you don't actually need to get it. However, I saw this question asked a lot online so I figured I would write in the solution. After clearing out all of the enemies in this room hit the switch and then go down the hallway. You will find a very large open room with a giant pit. Get Secret #3 before you fall down into the pit and swim back to the primary room of this level.
Back in the primary room you'll want to use the final wind tunnel, this will take you to a small room with a couple of enemies. The portal in this room is the exit of this level, before you go make sure you get Secret #4.
Secret #1
Secret #1: After using the first wind tunnel you'll find a hallway with multiple Fiends. Search the corners in this hallway as you travel through it, in one corner you'll find an area that you can drop down which is where this secret is found. Go through the slipgate here and you will come out in front of the Quad Damage in the previous area.
Secret #2
Secret #2: Go up the second wind tunnel from the entrance room. You'll find yourself in a room with some platforms surrounded by water. Go to the far side of the room from where you entered (right near the other wind tunnel you need to ride to progress the mission) and go into the water. Right on the other side of the wall you'll find an area to surface, it's a secret room with some ammo and a Rocket Launcher.
Secret #3
Secret #3: When you make it 3/4 of the way through this level you'll find a giant hole in the floor with some water at the bottom. Across the top of this hole there will be two long pillars - one of them will have a nice large red switch on it, shoot that and you'll open up a secret area nearby.
Secret #4
Secret #4: In the final room of this level just before the portal to leave you'll find a metal door on the floor that stands out. Shoot this door to reveal the final secret of the level. Be careful when falling into the hole because you'll want to avoid the portal at first so you can collect the loot!