Are there any cheats for Halo 3?

Answer 1

Yes, there are a few cheats here are some.

Hide Weapon, Show Coordinates & map; Camera ModesThe 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.

KEYS:

LB = Left Bumper

RB = Right Bumper

LS = Click in on Left Analog Stick

RS = Click in on Right Alalog Stick

Askar (10) Score over 15,000 points in the Campaign meta-game on the fourth mission. Assault (30) Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary. Black Eye (10) Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. Campaign Complete: Heroic (125) Finish the Campaign on Heroic (normal is unlocked as well). Campaign Complete: Legendary (125) Finish the Campaign on Legendary (normal and heroic are unlocked as well). Campaign Complete: Normal (125) Finish the Campaign on Normal. Catch (10) Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. Cavalier (10) Score over 15,000 points in the Campaign meta-game on the third mission. Cleansing (30) Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary. Demon (10) Score over 15,000 points in the Campaign meta-game on the second mission. Exterminator (10) Score over 15,000 points in the Campaign meta-game on the fifth mission. Famine (10) Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. Fear the Pink Mist (5) Kill 5 enemies with the needler in a ranked free for all playlist or in campaign. Fog (10) Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. Graduate (10) Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online). Guerilla (10) Score over 15,000 points in the Campaign meta-game on the first mission. Headshot Honcho (5) Kill 10 enemies with headshots in a ranked free for all playlist or in campaign. Holdout (20) Finish the second mission of the Campaign on Normal, Heroic, or Legendary. Iron (10) Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. Killing Frenzy (5) Kill 10 enemies without dying in any ranked free for all playlist (Online). Landfall (20) Finish the first mission of the Campaign on Normal, Heroic, or Legendary. Last Stand (40) Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary. Lee R Wilson Memorial (5) Score 5 grenade sticks in any ranked free for all playlist (Online). Marathon Man (40) Locate and access all Terminals in the Campaign. Maybe Next Time Buddy (5) Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online). Mongoose Mowdown (5) Splatter an enemy with the mongoose in a ranked free for all playlist (Online). MVP (5) Earn the MVP in any ranked playlist (Online). Mythic (10) Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. Orpheus (10) Score over 15,000 points in the Campaign meta-game on the eighth mission. Overkill (5) Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online). Ranger (10) Score over 50,000 points in the Campaign meta-game on the sixth mission. Reclaimer (10) Score over 15,000 points in the Campaign meta-game on the final mission. Refuge (30) Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary. Return (50) Finish the final mission of the Campaign on Normal, Heroic, or Legendary.