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This is a walkthrough for the level [[Cortana (level)|Cortana]], structured for play on [[Legendary]] difficulty with notes for lower difficulty levels. Cortana is the penultimate level of ''[[Halo 3]]'', and arguably one of the most difficult of the franchise. Your mission as stated is to find [[Cortana]] on the [[High Charity]], free her from the [[Gravemind]] and eliminate the [[The Flood|Flood]]. | This is a walkthrough for the level [[Cortana (level)|Cortana]], structured for play on [[Legendary]] difficulty with notes for lower difficulty levels. Cortana is the penultimate level of ''[[Halo 3]]'', and arguably one of the most difficult of the franchise. Your mission as stated is to find [[Cortana]] on the [[High Charity]], free her from the [[Gravemind]] and eliminate the [[The Flood|Flood]]. | ||
Your most valuable pieces of [[ | Your most valuable pieces of [[equipment]] in this level are [[Deployable Cover]]s and [[Bubble Shield]]s. [[Cloaking]] is also handy but extremely rare. It is recommended that you always have a Deployable Cover with you. [[Grenade]]s are also your friends here; [[Type-1 plasma grenade|Plasma Grenades]] are very effective against [[Flood ranged form|Flood Ranged Forms]] and [[Flood carrier form|Flood Carrier Forms]], and [[M9 High-Explosive Dual-Purpose Grenade|Fragmentation Grenades]] will thin out large groups of Flood and bring down shields on any shielded [[Flood combat form|Flood Combat Forms]]. Beware, though: if you have bad aim, you will be penalized in this level. [[Flood blister|Flood Blisters]] line High Charity's walls and if you are inaccurate you will unleash torrents of [[Pod infector]]s that will make you waste valuable ammunition and probably kill you. Once you've killed all the Flood in a room, melee their corpses to prevent re-animation of them. | ||
Using [[Halo 3 Skulls|Skulls]] on this level is not a good idea for inexperienced players, but using the Catch skull provides you with a distinct advantage, as the Flood do not use grenades, but upon death, they will almost always provide them with this skull active. | Using [[Halo 3 Skulls|Skulls]] on this level is not a good idea for inexperienced players, but using the Catch skull provides you with a distinct advantage, as the Flood do not use grenades, but upon death, they will almost always provide them with this skull active. | ||
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|- | |- | ||
|colspan=1|'''[[John-117|Master Chief]] Primary Weapon<br />Solo''' | |colspan=1|'''[[John-117|Master Chief]] Primary Weapon<br />Solo''' | ||
|colspan=1| [[M90 Close Assault Weapon System# | |colspan=1| [[M90 Close Assault Weapon System#Halo 3 and Halo 3.3A ODST|M90A Close Assault Weapon System]] | ||
|colspan=1| M90A Close Assault Weapon System | |colspan=1| M90A Close Assault Weapon System | ||
|colspan=1| N/A | |colspan=1| N/A | ||
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You will start this mission with the [[M90 Close Assault Weapon System|M90 Shotgun]] and the [[MA5C Individual Combat Weapon System|MA5C Assault Rifle]]. At the mission start, use your Assault Rifle to clean out the Infection Forms. Make sure they do not re-animate any of the nearby corpses. Collect some grenades before moving on. Plasma-based weaponry is more effective against shielded Flood, should you encounter any, but for now stick to your current weapons. | You will start this mission with the [[M90 Close Assault Weapon System|M90 Shotgun]] and the [[MA5C Individual Combat Weapon System|MA5C Assault Rifle]]. At the mission start, use your Assault Rifle to clean out the Infection Forms. Make sure they do not re-animate any of the nearby corpses. Collect some grenades before moving on. Plasma-based weaponry is more effective against shielded Flood, should you encounter any, but for now stick to your current weapons. | ||
As you round the corner, a few Flood | As you round the corner, a few Flood Blisters will automatically explode. Eliminate them quickly so that the infection Forms don't re-animate any bodies. Head up the sloped path to reach the chamber's upper level. Find some grenades and replace your Shotgun with an [[Type-1 Energy Weapon/Sword|Energy Sword]]. | ||
When you reach the [[ | When you reach the [[porta]] in the floor, drop through it and immediately take cover in the corner behind you. Stay sharp because combat forms with human weapons will appear. Take them down with quick bursts from your Assault Rifle, then close in on them and finish them off with the Energy Sword. Back away slowly and look out for the Carrier Forms that will appear. Use a grenade that sticks (Plasma, [[Type-2 Antipersonnel Fragmentation Grenade|Spike]] or [[Type-3 Antipersonnel/Antimatériel Incendiary Grenade|Incendiary]]) to kill them. When killed with a grenade, Carrier Forms won't unleash Infection Forms. | ||
===Where The Hell Did This Come From?=== | ===Where The Hell Did This Come From?=== | ||
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===Skulls=== | ===Skulls=== | ||
Activating Skulls on this level is at your own Peril, but here is a breakdown of skull use on this level and how it will affect your gameplay. | Activating Skulls on this level is at your own Peril, but here is a breakdown of skull use on this level and how it will affect your gameplay. | ||
==== | ====Gold==== | ||
*'''Iron''' | *'''Iron''' | ||
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:The Flood often don't have anywhere to dodge to, and they usually forget to dodge anyway. Also, they are too bulky to dodge. | :The Flood often don't have anywhere to dodge to, and they usually forget to dodge anyway. Also, they are too bulky to dodge. | ||
*'''Catch''' | *'''Catch''' | ||
:Activate this skull if you have it; the Flood don't use grenades, but they will drop more when they die, and will cause many deadly chain reactions if you throw a grenade near one, the only detraction here is large chain reactions can also burst | :Activate this skull if you have it; the Flood don't use grenades, but they will drop more when they die, and will cause many deadly chain reactions if you throw a grenade near one, the only detraction here is large chain reactions can also burst blisters and may kill you too. | ||
*'''Fog''' | *'''Fog''' | ||
:You will be surrounded very easily. However as your radar can often be deceptive on this level, if you do use it you're really not losing all that much of an advantage. Use it if you are going for the Meta-Game achievement, | :You will be surrounded very easily. However as your radar can often be deceptive on this level, if you do use it you're really not losing all that much of an advantage. Use it if you are going for the Meta-Game achievement, |