This one is fairly well known by now, but Jim Glover sent it to us first:
When you get the banshee to defend the Scarab, do everything as normal but where he destroys the door, break off the Banshee's wings; from there fly through the door and into the room where there are lots of brutes. Kill them, then fly full speed into the last part of the level. Once the you regain control run back to the banshee. If you flew it far enough, it should be there to use to kill Tartarus.
Waste all of the energy for the sword. There should be no blade. Now go invisible and you can magically see the blade. Its a little strange and a pretty funny glitch.
First to the easy stuff, most of all people know that crouching in mid air can gain you up to about a foot of hang time (amount of time in air) and height. Well, we're lucky to have and know this because you will need it.
This trick text is very long. Click the trick title for the complete entry.
On Headlong, put a wraith on the map and give every one an overshield. It is best if you modify an existing game type and have everyone start with overshields. Then go to the area where you can get a Banshee, look at the building and turn right, go staight, then to the middle section of the lower wall. Have one player go with their back straight up against the wall, and have another player in the wraith go as far back against the wall across from the other person.