When you have reached a level where you lead Marines or Covenant you'll be able to perform this sneaky little trick which should keep you alive a little bit longer. If you've got powerful weapons which are low on ammunition or power give them to the A.I. That follows as they'll never run out and they are more than competent with them.

In an open battlefield dual wield for maximum fire power as throwing Fragmentation Grenades will be a waste of time. If you are in an enclosed environment it is more effective to hold only one weapon which will allow you to use your free arm to detonate Fragmentation Grenades to deadly effect. The following are weapons that you will be able to dual wield:

Human Dual Weilding weapons

Magnum (Pistol) -
Sidearm which is deadly at close range particularly on head shots

SMG (Sub Machine Gun) -
Inaccurate but deadly, best used in small controlled bursts.

Battle Rifle -
Versatile weapon that can be used as a semi-automatic for close range or as a sniper rifle for long range.


Covenant Dual Weilding weapons

Plasma pistol -
Energy weapon that has two modes (manual rapid-shot and a powerful overcharged bolt of plasma) cannot be reloaded so must be discarded once spent.

Covenant Plasma Rifle -
Engergy weapon that causes its enemies to 'freeze' rendering them unable to return fire accurately, this weapon has to be discarded after use as it cannot be reloaded.

Needler -
Fires a rapid stream of small deadly needles that track their target and explode on contact. Unlike most Covenant weapons the Needler can be reloaded.

Note: By dual wielding it will take longer to reload and you will not be able to Melee attack.


All Weapons and their capabilities:

Human

Magnum (pistol) -
Dual Weild, Head Shot

SMG (Sub Machine Gun) -
Dual Weild

Battle Rifle -
Dual Weild, Zoom Once

Shotgun -
Splash Damage

Sniper Rifle -
Head Shot, Zoom Twice

Rocket Launcher -
Can Lock on, Splash Damage


Covenant

Plasma Pistol -
Dual Weild, Uses a Battery (non reloadable)

Plasma Rifle -
Dual Weild, Uses a Battery (non reloadable)

Beam Rifle -
Zoom Twice, Head Shot, Uses a Battery (non reloadable)

Covenent Carbine -
Zoom Twice

Brute shot -
Splash Damage

Needler -
Dual Weild, Can Lock on

Fuel rod cannon -
Splash Damage, Single Player only

Energy Sword -
Can Lock on


Vehicles available:

Human

M12 LRV Warthog
Yellow Civilian Hog
Pelican
Scorpion Tank


Covenent

Banshee
Covenant Drop Pod
Ghost
Phantom
Shadow
Wraith

2 players needed
Get 1 person to stand on another make sure the one on top has a plasma grenade
Person on top sticks the one on the bottom just before the grenade blows up the person on the bottom jumps(make sure person on top dosent fall off)once he or she has jumped the person on top jumps sending the person on top double hight the grenade will blow up and send the person on top a extra 2ft or so and when
The person on top is in the air press and keep hold of crouch and he or she should go about 10ft in the end the better you time the jump andgrenade the higher you will go.

First you select the level metropolis, then when you start the level kill the two marines then get in the tank and go to the tunnel( make sure to destroy all the ghosts,wraiths and all but one banshee! ) when you enter the tunnel MAKE SURE THE ONE BANSHEE THAT YOU DIDN'T KILL IS FOLLOWING YOU! Destroy everything in the tunnel except the banshee. When you get over the two walls there will be a passage with a red light, go through it, now the hard part.there is a little round tunnel that you have to go through to beat the level right? Well go through that tunnel and make sure that the banshee is in front of you in the tunnel it will say loading as soon as it does get in the banshee, if you don't the banshee will disappear! Now when you get out of the tunnel fly left then up to two buildings with two bridges connecting them, go to the one closest to you, and in the middle there will be a plasma rifle, only it is the scarab gun (Note: It will be floating over a caution cone type thing!)

Okay, here's what you do, you go to the level Quarentine Zone and turn around once the level starts and go through the cave and try to find a long ledge that leads into a fog, this MUST MUST be on lengendary, there will be a skull floating there, hold X and collect it, then exit the level, no go to that level after outskirts,(sry forgot what it was called), and go up to the part when you go through the sewer tunnel, then take that warthog that the dude wants you too shoot in and kill all the aliens and he'll take you to a path near a few ghosts nad a wraith, when you destroy evrything there he'll take you through another tunnel and once you get through exit the warthog and there will be a huge cracked window right in front of you, no jump onto the ledge and use a grenade jump, which the skull you obtained lets you grenade jump higher then once inside you jump on a silver that looks like a radio antenna and jump on another one ahead of you thats hangin in the air then jump onto the ledge and jump onto a higher ledge and then go into an edge between two buiidings and BAM! Theres a huge soccer ball there, now you need to melee it to get it down onto the street, then you can take a ghost with a friend to play soccer, which gets kinda stupid in about five minutes, c ya and wait for my info on how to get a plasma rifle lokkin scarab gun on the same level!

If you play at Zanzibar or Caugulation you may see ghostly figures. I saw these and they were yellow, brown, green, white, or gray. Once a threw a plasma grenade and there was yellow electricity. You can only see these "figures" in multiplayer. These "ghosts" look like they're holding guns.(I had only sniper rifles and it looked like they were holding the exact gun.) You can see through them.

Alright.First,You need a Battle Rifle and any other weapon.Best if used on Live or system link.Make sure the handicap is set to severe.Have the BR ready.Now,while running forward,press RRY fastly.You should see one burst,but another while fire from where you were standing and kill you.But,It won't say suicide.Instead,it will say Killed by the Gaurdians

Have two weapons one being a Battle Rifle. Have the battle Rifle out and tap R,R,X,Y,Y,R,R,X and if you timed it right it should fire 4 consecutive shots.