Gameplay

ONI Alpha Site/Walkthrough: Difference between revisions

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== Level Start ==
{{Status|Gameplay}}
Dutch and Mickey got attacked with heavy fire from the Covenant. The only way they can save themselves is to blow up the bridge and run…
This is a walkthrough for the Level [[ONI Alpha Site]] It is written for play on [[Legendary]] difficulty and has notes for lower difficulties.


You enter Dutch's vision, and Mickey will ask you to arm the charges. Each charge is found on a pillar. Simply get to them and press RB to arm them. Get off of the bridge and climb on the tower with a sniper rifle. Press the controls (press RB) and blow the bridge up. There should be no survivors. Although, sometimes 2 wraiths will survive on the piece of land at the beginning of the bridge, so watch out for those. You can make sure they don’t survive by shooting them with one Spartan Laser shot each; but make sure you have 2 laser shots for the Hunters in the next area.
This is the second mission that you play as [[Taylor H. Miles|Dutch]], with [[Michael Crespo|Mickey]] as your ally. Your mission is to defend the ONI Alpha Site facility and deny access to the Covenant. This mission is one big firefight. Your starting weapons are the [[Weapon/Anti-Vehicle Model 6 Grindell/Galileian Nonlinear Rifle|Spartan Laser]] and the [[M7S Caseless Submachine Gun|Silenced SMG]]. There is no subtlety or sneakiness to this level. You cannot avoid the enemy in any part of the game, so knowing your weapons, their capabilities and how to best use your [[Non-Playable Character|NPCs]] is really important. There are no "good" Skulls for this mission, but Black Eye, Tilt and Mythic will make this level feel nearly impossible to beat and incredible when you do.


== Behind the Walls ==
__TOC__
Dutch and Mickey fell back to the line, only knowing that taking out the bridge wasn't enough because the Covenant sent Phantoms behind them, attempting to breach their base…


The Phantoms drop down a [[Hunter]] pair, Grunts and Brutes. A [[Spartan Laser]] can instantly kill a Hunter with a direct hit in the gaps between their armor, or if you took the sniper rifle before, snipe it in the gaps of armor in its back or head. Staying on higher grounds would help in Legendary, so make sure that once you take out the Hunters to quickly get up the hill. Get across the fields and regroup with the NMPDs. Then hold the position until a NMPD screams fall back. Take the turret if you want; but be quick. Using the turrets up there without detaching them could mean you will die because the Wraiths will fire at the walls, killing you instantly on [[Legendary]], so it would be better if you quickly detach a turret and use it to fight off the brutes and grunts on the hill. Now go down to the gates, and you will find a rocket launcher. Pick it up and use it, and give it to Mickey before finishing off all the rockets. Since ODSTs cannot die, giving them powerful weapons would make them really strong and help you on lots of killing. Grab a turret or something and start the massacre!
== Boom Goes the Dynamite!!! (Or, Why I love my job!) ==
As you start this mission, you're running away from the Covenant. Get used to it, most of this mission is running away. Arm the charges, then head for the left hand tower and set them off, blowing the bridge and killing everything. You can run around shooting at enemies and eventually Mickey will detonate the charges, but on Legendary, you can't afford to waste the ammo. Head over to one of the [[M68 Gauss Cannon|Gauss turrets]], and take out the [[Zurdo-pattern Wraith|Wraith]] on the other end of the bridge, you'll end up shooting two [[Type-26 Ground Support Aircraft|Banshees]] too. You could skip this, but occasionally some Plasma Mortars will make it over the wall. Don't risk it, take a few seconds and clear your enemies. Once done, head under the wall with Mickey.


== ONI Base Interior ==
== You Wanna Piece of This!! (Or, Come get Some!) ==
Dutch and Mickey tried to hold back the Covenant forces, but they fall back due to the overwhelming forces…
Under the wall, Melee the [[Kig-yar|Jackals]] before heading out.  Bring up the Spartan Laser and quickly dispatch the two [[Mgalekgolo|Hunters]]. If you're lucky a few others will stray into the beam. Start running. Head towards the building shooting and tossing grenades. It will give you a little relief when you're running to the shelters. Once on the first tier, swap your Silenced SMG for an [[MA5B ICWS Assault Rifle|MA5C]]. There's plenty around and on legendary difficulty there will be plenty of dead Marines to get ammo from. The MA5C is better at close range than the Silenced SMG and has a better melee. On lower difficulties, stick to the Silenced SMG, the Marines are heartier and won't die so you can't get more ammo, plus the Silenced SMG deals death pretty well on lower difficulties. As you withdraw, use lots of grenades if you have them, as there are plenty around. Once you're at the top, stay away from the [[AIE-486H Heavy Machine Gun|turrets]] as getting behind a stationary emplacement at this point is instant death, run down the stairs, grab the [[M41 SSR MAV/AW Rocket Launcher|Rocket Launcher]] behind the wall and give it to Mickey. He'll do a lot more damage with that than the Silenced SMG. Run back and grab your Spartan Laser. There seems to be three ways to trigger the recall into the building:
#Running around killing indiscriminately until a certain amount of time has passed.


A turret is in the middle. Grab the turret without detaching it. Make sure you are ready because once the Covenant start coming in, they won’t stop. It will be like a shooting gallery, having you switch from the left doors and the right doors. The first wave would be lots of Suicidal Grunts. Having the turret can kill them easily. The second wave would still be lots of Grunts and a few shielded Jackals. In Legendary, you may want to stop, as the third wave with Brutes would be coming. Since they wield Brute Shots, using the turret would be a problem. But it's okay if you have nice aiming or you're not playing on Legendary. Behind the lines, a Phantom flies by and drops off a couple Brutes with brute shots and brute plasma rifles. Detach the turret (if it's still intact) and start the killing. As long as the brutes get killed, you’re fine. Waste them and Mickey will ask you to get to his position, which is at the elevator in the previous room.
#Killing the [[Brute Chieftain|Chieftain]] with the [[Gravity hammer (fiction)|Gravity Hammer]] (this one is really hard so don't bother unless you're really sure you can get him).


== Up the Lift ==
#Destroying the Wraiths. If you're playing on Legendary, you should be able to kill a Wraith with one shot from a Spartan Laser. Target the one on the left first, then run to the right and kill the second one. This should trigger the recall. Before you run in, on the ground on the right side behind the barrier at the top there's another full Laser, and another at the top on the center balcony, grab either one. If you think you can get away with it, grab a turret too. Head inside.
Dutch and Mickey met a surviving NMPD officer in the lift, and together they go up to the rooftop…


 Drones will appear and start shooting at you. Take cover behind the door of the lift, and pop up to shoot the drones whenever you feel like it. But it would be best to save your ammo for the following fight. This would be a smart thing to do on Legendary because after you come off the lift, it will leave you with almost no cover whatsoever on the rooftop. Once you get to the top and the doors open, get ready.  
== Bring the Rain!!! (Or, Lead Showers and Bloody Flowers) ==
Once you're inside, head over to the center and drop your second turret towards the back stairs; it will be safe there and you can come back for it later. Take your place at the second turret. Follow the directions of Mickey and the NMPD officer, but don't be beholden to them, keep sweeping left and right. You can kill the [[Unggoy|Kamikaze Grunts]] and [[Kig-Yar|Jackals]], but watch out for the [[Jiralhanae|Brutes]] with [[Type-25 Grenade Launcher|Brute Shots]]. Hop off the turret and wade into the fray, using grenades and your [[Assault Rifle]]. The Brutes seem to focus on the center, so if you stay to the top you can sneak around and assassinate them from behind. This isn't foolproof though, so stay alert. Between Mickey and yourself, you should be able to end the frontal assault quickly. Next, grab one of the turrets and watch for the [[Kez'katu-pattern Phantom|Phantom]] to drop its troops behind you. Use the turret to clear the Brutes and then finish the rest off with your MA5C, taking out the Jackals and Grunts. Mickey's rockets will do plenty of damage to help you out. Once you're done, trade a Brute Shot for your MA5C, keep your Spartan Laser and the other turret. Grab any grenades you can find and head on to the elevator.


== Extraction Point ==
== Enjoy a Firefight on Our Beautiful Rooftop Patio.. ==
Dutch and Mickey fought the Drones all the way up to the roof. But they won’t get out of this easily…
Before you start the elevator, drop your turret and swap your Brute Shot for the Silenced SMG on the floor. Pick up the turret (it can disappear), and activate the elevator. Drop the turret near the door and stay clear of Mickey and the cop as they shoot their rockets and grenades at the [[Yanme'e|Drones]], clean up what they miss. As you reach the top, go back for the Brute shot and pick up the turret. The heavy weapons will make short work of the jump Brutes here and you can then focus on the Chieftain. Between your laser and Mickey's rockets, he won't last very long. Hop on the [[D77C-NMPD Pelican Dropship|Pelican]] and watch the fireworks...


 Now you made it. Get off the lift and find yourself outside. Once up, there are lots of Jump Pack Brutes and a Gravity Hammer wielding War-Chieftain. The NMPD officer usually won't make it here. On Legendary, it takes about four shots from a Spartan Laser to kill the Chieftain, but less if you gave Mickey a Rocket launcher. Kill the Brutes out there and an NMPD Pelican will arrive. Getting on it will end the level and show the Post-Game Carnage.
== Legendary Notes==
*Machine Gun Turrets outside the building plus user playing on Legendary equals dead user. Stationary emplacements are quick death, by grenade, Wraith, Brute Shot, Beam Rifle, or some combination thereof. Removing one from an emplacement and running around with it is slow and there's too much climb, though if you stand still, it mows down Brutes faster than a Sniper Rifle, but standing still on this level can easily be equated with death.
*Machine Gun Turrets inside the building plus user playing on Legendary equals victory. Using the turret inside the ONI building and knowing when to get off (preferably before grenades hail down upon you) will clear out all of the minor annoyances and some of the big Gorilla looking ones. Ripping it off and running around will quickly finish off Brutes with short controlled bursts. An extra turret if you can get one from outside without dying is a great assist for the roof.
*Don't take out the banshees at the bridge part with your Spartan Laser. Those banshees hardly ever harm you, and the laser shots you use on them would be a waste, as you need them for the next section.
*On the way up the lift, hide behind the door/glass section, if you don't want to get shot by the Drones.
*When the enemies start flooding into the ONI building, make sure you keep strafing from left to right and back again. If you keep your attention fixed on one side without paying attention to the other, you will definitely die.
*Since Mickey is invulnerable, make sure he has the Rocket Launcher, with unlimited ammo he's an invaluable assett to staying alive.


== Quick Tips ==
==Notes for Lower Difficulties==
*Staying at one of the Machine Gun Turret emplacements outside is death, but with four turrets available, you can easily mow down enemies on lower difficulties until the recall is triggered. You may even be able to snag the Chieftain and his Gravity Hammer.
*Taking the Sniper Rifle from the tower isn't recommended, but on lower difficulties it's easier to learn how to shoot on the move without the scope to assist you.
*On lower difficulties if you don't assault the Chieftain on the roof, eventually the pelican will show up and burn into his shields and armor leaving him exposed for you to finish off.
*The description of Normal is perfect for this level. Burn enough ammo and you will win.
{{Quote|Face firm resistance from competent, determined enemies, but burn through enough ammo and you will eventually triumph.|Description from ''[[Halo 3]]'' and ''[[Halo 3: ODST]]''}}


== Gallery ==
<gallery>File:Odst_onialphasite02.jpg|Taking out the enemies before blowing up the bridge will gain you a Killing Frenzy or higher.
File:Odst_onialphasite01.jpg|The banshees are not that much of a threat, but you can take them out anyways.
File:Odst_onialphasite06.jpg|Be careful about taking out the Chieftain on all difficulties!
</gallery>


 
{{succession box
*Using the Machine Gun Turret inside the building without detaching it is a good idea. Just detach it once the brutes come in to take out their shields, then go in for the kill
|before = ''[[Kizingo Boulevard/Walkthrough|Kizingo Boulevard]]'' <br />
**Another good idea is to kill the grunts and jackels in the area. Then, once the Brutes come, run to the back of the room and stay in the doorway there. The Brutes will almost never go back there to fight you, except maybe more frequently on Legendary. Just make sure you don't get shot from them when they are away from you
|title  = Halo 3: ODST Campaign Walkthrough for:
*Dont take out the banshees at the bridge part. Those banshees hardly harm you, and the laser shots you use on them would be a waste, as you need them for the next section
|years  = '''''Coastal Highway'''''
*On the way up the lift, hide behind the door/glass section, as you won't get shot by the drones
|after  = ''[[NMPD HQ (Level)/Walkthrough|NMPD HQ]]''
*On the roof, give Mickey the tough weapons (e.g., Rocket Launcher, Splazer if you still have it and the Machine Gun, if you still have it) and hide inside where the lift exit is. That way you won't have to fight as much.
}}
*At the outdoor area after the bridge, DO NOT go right into battle, especially on Legendary. Take out the hunters, run up to the machine gun & shoot the crap out of the brutes. Then, just take out the rest of the guys from a short-mid range distance. If you battle them right at the beggining, you will be surrounded and will probably die.
[[Category:Halo 3: ODST walkthroughs]]
*When the enemies start flooding into the building when you are in the middle with your team, make sure you switch from side 1 to side 2. If you continue to shoot and throw grenades at one side without caring about the other side, you will probably lose alot of health and die.
 
== Trivia ==
 
*Blowing up the [[Banshees]] and [[Wraiths]] on the bridge would cause Mickey to activate the charges and shows dissatisfaction.
*On the bridge, you get two kills if you shoot down a Banshee with the Spartan Laser and three kills if you shoot down the Wraiths. There are two Banshees and three Wraiths that would make getting the achievement easier.
*There is a hidden Rocket launcher near the gates of the ONI Base.
 
== Gallery ==
[[File:Odst_onialphasite02.jpg|thumb|left|300px|Taking out the enemies before blowing up the bridge will gain you a Killing Frenzy or higher.]][[File:Odst_onialphasite01.jpg|thumb|left|300px|The banshees are not that much of a threat, but you can take them out anyways.]][[File:Odst_onialphasite06.jpg|thumb|left|300px|Be careful about taking out the Chieftan on all difficulties!]]
[[Category:Walkthrough]]

Latest revision as of 03:13, January 5, 2023

This is a walkthrough for the Level ONI Alpha Site It is written for play on Legendary difficulty and has notes for lower difficulties.

This is the second mission that you play as Dutch, with Mickey as your ally. Your mission is to defend the ONI Alpha Site facility and deny access to the Covenant. This mission is one big firefight. Your starting weapons are the Spartan Laser and the Silenced SMG. There is no subtlety or sneakiness to this level. You cannot avoid the enemy in any part of the game, so knowing your weapons, their capabilities and how to best use your NPCs is really important. There are no "good" Skulls for this mission, but Black Eye, Tilt and Mythic will make this level feel nearly impossible to beat and incredible when you do.

Boom Goes the Dynamite!!! (Or, Why I love my job!)[edit]

As you start this mission, you're running away from the Covenant. Get used to it, most of this mission is running away. Arm the charges, then head for the left hand tower and set them off, blowing the bridge and killing everything. You can run around shooting at enemies and eventually Mickey will detonate the charges, but on Legendary, you can't afford to waste the ammo. Head over to one of the Gauss turrets, and take out the Wraith on the other end of the bridge, you'll end up shooting two Banshees too. You could skip this, but occasionally some Plasma Mortars will make it over the wall. Don't risk it, take a few seconds and clear your enemies. Once done, head under the wall with Mickey.

You Wanna Piece of This!! (Or, Come get Some!)[edit]

Under the wall, Melee the Jackals before heading out. Bring up the Spartan Laser and quickly dispatch the two Hunters. If you're lucky a few others will stray into the beam. Start running. Head towards the building shooting and tossing grenades. It will give you a little relief when you're running to the shelters. Once on the first tier, swap your Silenced SMG for an MA5C. There's plenty around and on legendary difficulty there will be plenty of dead Marines to get ammo from. The MA5C is better at close range than the Silenced SMG and has a better melee. On lower difficulties, stick to the Silenced SMG, the Marines are heartier and won't die so you can't get more ammo, plus the Silenced SMG deals death pretty well on lower difficulties. As you withdraw, use lots of grenades if you have them, as there are plenty around. Once you're at the top, stay away from the turrets as getting behind a stationary emplacement at this point is instant death, run down the stairs, grab the Rocket Launcher behind the wall and give it to Mickey. He'll do a lot more damage with that than the Silenced SMG. Run back and grab your Spartan Laser. There seems to be three ways to trigger the recall into the building:

  1. Running around killing indiscriminately until a certain amount of time has passed.
  1. Killing the Chieftain with the Gravity Hammer (this one is really hard so don't bother unless you're really sure you can get him).
  1. Destroying the Wraiths. If you're playing on Legendary, you should be able to kill a Wraith with one shot from a Spartan Laser. Target the one on the left first, then run to the right and kill the second one. This should trigger the recall. Before you run in, on the ground on the right side behind the barrier at the top there's another full Laser, and another at the top on the center balcony, grab either one. If you think you can get away with it, grab a turret too. Head inside.

Bring the Rain!!! (Or, Lead Showers and Bloody Flowers)[edit]

Once you're inside, head over to the center and drop your second turret towards the back stairs; it will be safe there and you can come back for it later. Take your place at the second turret. Follow the directions of Mickey and the NMPD officer, but don't be beholden to them, keep sweeping left and right. You can kill the Kamikaze Grunts and Jackals, but watch out for the Brutes with Brute Shots. Hop off the turret and wade into the fray, using grenades and your Assault Rifle. The Brutes seem to focus on the center, so if you stay to the top you can sneak around and assassinate them from behind. This isn't foolproof though, so stay alert. Between Mickey and yourself, you should be able to end the frontal assault quickly. Next, grab one of the turrets and watch for the Phantom to drop its troops behind you. Use the turret to clear the Brutes and then finish the rest off with your MA5C, taking out the Jackals and Grunts. Mickey's rockets will do plenty of damage to help you out. Once you're done, trade a Brute Shot for your MA5C, keep your Spartan Laser and the other turret. Grab any grenades you can find and head on to the elevator.

Enjoy a Firefight on Our Beautiful Rooftop Patio..[edit]

Before you start the elevator, drop your turret and swap your Brute Shot for the Silenced SMG on the floor. Pick up the turret (it can disappear), and activate the elevator. Drop the turret near the door and stay clear of Mickey and the cop as they shoot their rockets and grenades at the Drones, clean up what they miss. As you reach the top, go back for the Brute shot and pick up the turret. The heavy weapons will make short work of the jump Brutes here and you can then focus on the Chieftain. Between your laser and Mickey's rockets, he won't last very long. Hop on the Pelican and watch the fireworks...

Legendary Notes[edit]

  • Machine Gun Turrets outside the building plus user playing on Legendary equals dead user. Stationary emplacements are quick death, by grenade, Wraith, Brute Shot, Beam Rifle, or some combination thereof. Removing one from an emplacement and running around with it is slow and there's too much climb, though if you stand still, it mows down Brutes faster than a Sniper Rifle, but standing still on this level can easily be equated with death.
  • Machine Gun Turrets inside the building plus user playing on Legendary equals victory. Using the turret inside the ONI building and knowing when to get off (preferably before grenades hail down upon you) will clear out all of the minor annoyances and some of the big Gorilla looking ones. Ripping it off and running around will quickly finish off Brutes with short controlled bursts. An extra turret if you can get one from outside without dying is a great assist for the roof.
  • Don't take out the banshees at the bridge part with your Spartan Laser. Those banshees hardly ever harm you, and the laser shots you use on them would be a waste, as you need them for the next section.
  • On the way up the lift, hide behind the door/glass section, if you don't want to get shot by the Drones.
  • When the enemies start flooding into the ONI building, make sure you keep strafing from left to right and back again. If you keep your attention fixed on one side without paying attention to the other, you will definitely die.
  • Since Mickey is invulnerable, make sure he has the Rocket Launcher, with unlimited ammo he's an invaluable assett to staying alive.

Notes for Lower Difficulties[edit]

  • Staying at one of the Machine Gun Turret emplacements outside is death, but with four turrets available, you can easily mow down enemies on lower difficulties until the recall is triggered. You may even be able to snag the Chieftain and his Gravity Hammer.
  • Taking the Sniper Rifle from the tower isn't recommended, but on lower difficulties it's easier to learn how to shoot on the move without the scope to assist you.
  • On lower difficulties if you don't assault the Chieftain on the roof, eventually the pelican will show up and burn into his shields and armor leaving him exposed for you to finish off.
  • The description of Normal is perfect for this level. Burn enough ammo and you will win.

"Face firm resistance from competent, determined enemies, but burn through enough ammo and you will eventually triumph."
— Description from Halo 3 and Halo 3: ODST

Gallery[edit]

Preceded by
Kizingo Boulevard
Halo 3: ODST Campaign Walkthrough for:
Coastal Highway
Succeeded by
NMPD HQ