Glitches: Ivory Tower - The Matrix:

Probably the biggest Glitch in Halo 2 is the ability to Enter the 'Matrix' on the multiplayer map, Ivory Tower.

You will need 2 players and a Lightning Sword for your player.

Go to the staircase where the Overshield is (westside of the map).

At the top of the staircase, just before the top landing, on the right side (going up the stairs) there is a small ledge just off the side of the staircase (known to some already). Get one of the players onto the ledge off of the staircase, standing upright facing the 'glass' sheet or fencing part in between yourself and the staircase opposite.

Get the 2nd player to stand directly opposite you, a few feet away from the 'glass' sheet or fence. Lunge at them with the Lightning Sword, while walking forwards, get the 2nd player to also walk slowly backwards. Keep lungeing and walking forwards, eventually (usually takes about 3 to 5 'lunges') you will fly through the 'glass' sheet and out to the bottom below, you may first fall on the ledge below of the building, but walk off of it forwards and down into the white space.

You won't die.

What you will see now, is nothing. You will be standing on nothing. Glaring whiteness is all around. (Beats me why my friends called it 'The Matrix'). If you have 3 players get them to repeat the above steps with the 2nd player, and you will both be able to be in 'The Matrix'.

For a strange reason you can both see each other perfectly within about 20 feet.

This is a good place for Sword duels, get both of you to run as far as possible to opposite sides of 'The Matrix' and then try and find each other, and have a duel.

Carry something down there to kill yourself with, because eventually you'll want to get back up.