This Halo 3 walkthrough is divided into 24 total pages.
You can jump to nearby pages of the game using the links above.
Cleansing - It Followed Me Home
Turn to the right and follow the path. Go up the ramps.
![Halo 3 Walkthrough - Halo 3 143](halo-3-143-small.webp)
Go forward and then around the left bend.
![Halo 3 Walkthrough - Halo 3 144](halo-3-144-small.webp)
Follow this path until you find the marines.
![Halo 3 Walkthrough - Halo 3 145](halo-3-145-small.webp)
The flood will show up converting marines in to flood zombies.
![Halo 3 Walkthrough - Halo 3 146](halo-3-146-small.webp)
Kill the little flood monsters to keep the others from being resurrected.
![Halo 3 Walkthrough - Halo 3 147](halo-3-147-small.webp)
Go to the right side of the ramp and then up the stairs to the right.
![Halo 3 Walkthrough - Halo 3 148](halo-3-148-small.webp)
Go through the door. In the next room will be some flood and a marine. Kill the marine if he gets infected.
![Halo 3 Walkthrough - Halo 3 149](halo-3-149-small.webp)
Go through door at far end of room.
![Halo 3 Walkthrough - Halo 3 150](halo-3-150-small.webp)
To the left is stairs down. There are lots of flood down here.
![Halo 3 Walkthrough - Halo 3 151](halo-3-151-small.webp)
To the back and right of where you stepped of the stairs is the way to go.
![Halo 3 Walkthrough - Halo 3 152](halo-3-152-small.webp)
When you enter the room, go to the left and then to the right when you can. There will be more flood here to kill.
![Halo 3 Walkthrough - Halo 3 153](halo-3-153-small.webp)
Go under the walkway and up the stairs to the right.
![Halo 3 Walkthrough - Halo 3 154](halo-3-154-small.webp)
Go around on the walkway to a door.
![Halo 3 Walkthrough - Halo 3 155](halo-3-155-small.webp)
Drop down through the hole and have a chat with Cortana.
![Halo 3 Walkthrough - Halo 3 156](halo-3-156-small.webp)
After the chat with Cortana, head to the left and around to the arbiter.
![Halo 3 Walkthrough - Halo 3 157](halo-3-157-small.webp)
Go through the door he is facing. Go around the winding passages. Flood will attack you around the first bend.
![Halo 3 Walkthrough - Halo 3 158](halo-3-158-small.webp)
At the end of passage is a door. Go through the door.
![Halo 3 Walkthrough - Halo 3 159](halo-3-159-small.webp)
To the right is the door out of the room.
![Halo 3 Walkthrough - Halo 3 160](halo-3-160-small.webp)
Follow this hallway to the outside. When the Chief reaches the outside, a cut scene begins.
More Halo 3 Walkthroughs
This Halo 3 walkthrough is divided into 24 total pages.