Various cheats
     Hide  Weapon,  Show  Coordinates  &  Camera  Modes. The following
cheats  can be performed during a local match or replay only. You must
simultaneously  PRESS  &  HOLD  the following buttons for 3 SECONDS to
toggle the effect on / off.

LB = Left Bumper
RB = Right Bumper
LS = Click in on Left Analog Stick
RS = Click in on Right Alalog Stick

LB + RB + LS + A + DOWN [D-PAD]:       Toggle Hide Weapon
[HOLD LS + RS] Press Left on D-Pad:    Toggle Pan-Cam / Normal 
                                       while Show Corrdinates 
                                       is enabled
LB + RB + LS + A + UP [D-PAD]:         Toggle Show Coordinates / 
                                       Camera Mode


Achievements:
     Complete   the   following   achievements  to  unlock  Xbox  Live
Gamerscore points.

Landfall (20 points): 
     Finish  the  first  mission of the Campaign on Normal, Heroic, or
Legendary.

Holdout (20 points): 
     Finish  the  second mission of the Campaign on Normal, Heroic, or
Legendary.

The Road (20 points): 
     Finish  the  third  mission of the Campaign on Normal, Heroic, or
Legendary.

Assault (30 points): 
     Finish  the  fourth mission of the Campaign on Normal, Heroic, or
Legendary.

Cleansing (30 points): 
     Finish  the  fifth  mission of the Campaign on Normal, Heroic, or
Legendary.

Refuge (30 points): 
     Finish  the  sixth  mission of the Campaign on Normal, Heroic, or
Legendary.

Last Stand (40 points): 
     Finish  the seventh mission of the Campaign on Normal, Heroic, or
Legendary.

The Key (40 points): 
     Finish  the  eighth mission of the Campaign on Normal, Heroic, or
Legendary.

Return (50 points): 
     Finish  the  final  mission of the Campaign on Normal, Heroic, or
Legendary.

Campaign Complete: 
     Normal (125 points): Finish the Campaign on Normal.

Campaign Complete: 
     Heroic  (125  points):  Finish  the  Campaign  on Heroic (unlocks
achievement for Normal, if not earned).

Campaign Complete: 
     Legendary (125 points): Finish the Campaign on Legendary (unlocks
achievements for Normal and Heroic, if not earned).

Iron (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Black Eye (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Tough Luck (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Catch (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Fog (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Famine (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Thunderstorm (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Tilt (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Mythic (10 points): 
     Finish  the  Campaign  on Normal, Heroic, or Legendary, then find
and claim this skull.

Spartan Program Recruit (10 points): 
     Win  your  first  game  in matchmaking to sign up for the Spartan
Program (Online).

UNSC Spartan (15 points): 
     Earn your Sergeant rating to be recognized as a true Spartan (Online).

Spartan Officer (25 points): 
     Advance to the Spartan Officer ranks (Online).

Two for One (5 points): 
     Score  a Double Kill with a single spartan laser shot in a ranked
free for all playlist (Online).

Too Close to the Sun (5 points): 
     Destroy an enemy banshee with the spartan laser or missile pod in
a ranked playlist or in campaign.

Triple Kill (5 points): 
     Kill  3  enemies within 4 seconds of one another in a ranked free
for all playlist (Online).

Overkill (5 points): 
     Kill  4  enemies within 4 seconds of one another in a ranked free
for all playlist (Online).

Lee R Wilson Memorial (5 points): 
     Score 5 grenade sticks in any ranked free for all playlist (Online).

We're in for some Chop (5 points): 
     Destroy  an  enemy vehicle with equipment in a ranked playlist or
in campaign.

Killing Frenzy (5 points): 
     Kill 10 enemies without dying in any ranked free for all playlist
(Online).

Steppin' Razor (5 points): 
     Score  a  Triple  Kill  with  the  sword in a ranked free for all
playlist (Online).

Mongoose Mowdown (5 points): 
     Splatter  an  enemy  with  the  mongoose in a ranked free for all
playlist (Online).

Up Close and Personal (5 points): 
     Kill 5 enemies by melee or assassination in a ranked free for all
playlist (Online).

Fear the Pink Mist (5 points): 
     Kill 5 enemies with the needler in a ranked free for all playlist
or in campaign.

Headshot Honcho (5 points): 
     Kill  10 enemies with headshots in a ranked free for all playlist
or in campaign.

Used Car Salesman (5 points): 
     Destroy  a  vehicle  that  has  three  enemies  in it in a ranked
playlist or in campaign.

Marathon Man (40 points): 
     Locate and access all Terminals in the Campaign.

MVP (5 points): 
     Earn the MVP in any ranked playlist (Online).

Maybe Next Time Buddy (5 points): 
     Board  the  same vehicle within 10 seconds after being boarded in
any free for all playlist (Online).

Demon (10 points): 
     Score over points in the Campaign meta-game on the second mission.

Guerilla (10 points): 
     Score over points in the Campaign meta-game on the first mission.

Cavalier (10 points): 
     Score over points in the Campaign meta-game on the third mission.

Askar (10 points): 
     Score over points in the Campaign meta-game on the fourth mission.

Exterminator (10 points): 
     Score over points in the Campaign meta-game on the fifth mission.

Ranger (10 points): 
     Score over points in the Campaign meta-game on the sixth mission.

Vanguard (10 points): 
     Score over points in the Campaign meta-game on the seventh mission.

Orpheus (10 points): 
     Score over points in the Campaign meta-game on eighth mission.

Reclaimer (10 points): 
     Score over points in the Campaign meta-game on the final mission.