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LB's "Halo 3" Walkthrough and Strategy Guide
Chapter 5 - Floodgate


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Chapter 5 - Floodgate

0. Introduction
1. Chapter 1 - Sierra 117
2. Chapter 2 - Crow's Nest
3. Chapter 3 - Tsavo Highway
4. Chapter 4 - The Storm
5. Chapter 5 - Floodgate
6. Chapter 6 - The Ark
7. Chapter 7 - The Covenant
8. Chapter 8 - Cortana
9. Chapter 9 - Halo
10. Multiplayer
11. Skulls and Terminals

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Chapter 5 - Floodgate



It followed me home



Find the crashed Flood ship



The majority of this mission simply requires you to backtrack along the path you took in the last mission except this time there is a new enemy, the Flood.

You start out at the destroyed anti-air cannon. Head down the dirt path toward the warehouses and continue along the roadway. As you turn the corner to the left towards the first warehouse bay door you'll see a multitude of Flood drop in. Toss a few grenades when they're all together and finish them off with the Battle Rifle.

Checkpoint.

When it's clear you'll note that the bay door won't open. Locate the stairs and upper room on the right (if you followed this walkthrough this is where you got the Sniper Rifle in the previous mission). Go up and into the room, popping the little Bugs that you encounter.


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From this room you can look down at the warehouse floor. There are a ton of Flood enemies below. Wait for the Arbiter to catch up to you and stand up there with him shooting down at them. If any come up into the room use your Melee attack (elbow) to pop them. They are very susceptible to this attack and will usually go down with one hit.

If you want, you can hop down and fight them face to face as well. Again, the Melee attack works great. Also, be sure to use any grenades that you may have.

When they're all dead search their bodies for a Regenerator and I recommend trading in your Assault Rifle for dual-wielded Spikers.

Continue forward but stay back a bit and let the Arbiter do some of the dirty work for you. Join in with your Spikers when you feel like it.

Checkpoint.

You'll soon reach a well lighted, blue-ish bay door. It's locked. Locate the stairs and catwalk to the right of it (if facing the bay door from a few meters back). Go up the stairs and follow the catwalk path until you get to a hole in the floor. Drop down through it.

Checkpoint.

After a quick Cortana flashback go forward to the Arbiter. Next to him is a weapons station with Shotguns. If you want one, feel free to grab one but I prefer the Battle Rifle. You'll still want to have the dual-wielded Spikers.

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Go through the door to the right of the weapon station and you'll find yourself in the room that you have to weave your way through. Around the first corner are a slew of Flood. Lay into them with the Spikers. After they're all dead I recommend trading in your Spikers for dual-wielded Plasma Rifles.

Continue forward and you'll soon be outside, overlooking the second lake bed (where you took out the Scarab). Move forward for a cutscene.

Checkpoint.

Shadow of Intent



Head down into the lake bed, or the path that is now the lake bed, and move forward along the path. As soon as you see Flood enemies dropping in run back so that they don't surround you. Wait a second or two to let the Arbiter join in and then use the Plasma Rifles which are very effective against the flood.

When the path is clear look around for another Plasma Rifle(s) to replace the ones you have which are probably low on charges.

At the end of the path head up the ramp and into the next warehouse.

Checkpoint.

Fight your way through the warehouse using the Plasma Rifles. There are many Flood in here which come in two waves. The second will come from the upper catwalk. After you kill them all, look for a Plasm Rifle replacement and then go up to that catwalk via the stairs and ramps on the left.

Head through the door and you'll soon be outside again.

Checkpoint.

Search the ship for Cortana



Before you run forward hang out for a minute and wait for some Elites to join in on the battle. They are friends of the Arbiter and will fight alongside you. When you see them making their way forward, join them.


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There aren't any difficult Flood here until you get near the ship. Here you'll encounter two Flood Hunters (I call them Flood Hunters because they're stronger than normal Flood and travel in pairs). I had success against them in a variety of ways. The first was using the Plasma Rifles and just pumping them full of plasma. You can also pick up an Energy Sword along the way and Melee them with it.

If there is a Spider Sniper(s) in the tower just beyond them it can make this fight difficult. Your options in this scenario are to wait until the Elite come in and take out those Spider Snipers or to use your Battle Rifle to pick the Spiders off and then concentrate on the Flood Hunters. Either way it's best to take out the Spiders before taking on the Hunters.

When you get to the end of the path drop down to the yellow lit dirt path.

Checkpoint.

Go forward to the dead end and then look up and to the right. This is the crashed ship and you have to walk up the steep slope of its side...you'll see a waypoint at the top.

Once you climb up the ship drop down (and if you hit the ledge, drop down again) to the bottom.

Infinite Devil Machine



There is no more fighting to be done on this level. Just follow the path, drop down again, and follow the path to the flashing blue terminal, Cortana. Go up to the terminal and hit "RB" to "retrieve Cortana".

Chapter 5 - Floodgate - Skulls and Terminals

Looking for Skulls or Forerunner Terminals?

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