September 25, 2007
UK chat show host Jonathan Ross voices one of the marines that helps Master Chief in the campaign, although it is an extremely rare occurrence for one of his lines to come up.
In an out of the way hidden area at the beginning of the last campaign level, there is a hidden 2D image of a man in nothing but gym shorts, dubbed the "Half-Naked Guy". This man is Bungie co-founder Jason Jones. This same image can be seen during a cutscene in Halo 2.
Pressing down on both thumbsticks while at the loading screen on December 25th will display a wider view of the Halo ring. Looking closely, it's possible to see the words "Happy Birthday, Lauren!" spelled out on the ring's surface.
In the game's last level, Spoiler:shortly before reaching the Frigate, there is a Grunt hidden at the end of a small pathway around some rocks. The Grunt will taunt Master Chief, and then proceed to plead for his life. However, if Thel Vadam sees the Grunt, he will kill him before the Grunt has a chance to finish talking.
The Beta release included an achievement called "Cheneymania", awarded for killing 10 opponents in a row with the shotgun without dying. This is a reference to former United States vice-president Dick Cheney, who accidentally shot someone with a shotgun.
Although Spartans and Elites have different body shapes, they use the same hitbox. Because of this, there's a glitch where bullets, grenades, and Needler rounds will pass unimpeded through part of an Elite player's neck without dealing damage to the player.
In the multiplayer map "Sand Trap," it is possible to flip an Elephant over. When A Spartan/Elite tries to flip it back over, it will say "Hold RB to flip... wait, what? How did you do that?"
On the level "Crow's Nest", you can find a solder knocking on a door wanting ammo, while the man behind the door will ask for a password to get in. Depending on what difficulty you are playing, the conversation is different. These conversations are performed by the online comedy group, Rooster Teeth, famous for their Halo series, Red vs. Blue.
There is a family of three monkeys and a teddy bear hidden in the first playable level of the game.
Halo 5: Guardians
Halo 3: ODST
Halo: Combat Evolved
Gears of War
Conker: Live & Reloaded
Kinect Joy Ride
Dead or Alive 3
Gears of War 3
Duke Nukem: Manhattan Project
Kameo: Elements of Power
Oddworld: Munch's Oddysee
Zoo Tycoon 2
Gears of War 2
Kung Fu Chaos
Blinx 2: Masters of Time and Space
Kakuto Chojin: Back Alley Brutal
Banjo-Kazooie: Nuts & Bolts
Viva Piñata: Party Animals
Perfect Dark Zero
ToeJam & Earl III: Mission to Earth
Myth II: Soulblighter
Grabbed by the Ghoulies
Blinx: The Time Sweeper
Double Dragon Neon