Instant Item Respawn Spawn any object. Set its run time minimum to four. It is now on instant respawn.	Edit Delete
Infinite Explosions Ok, so here is how this works. You take a fusion coil, and set its run time minimum to 4. You then repeat the process until you have run out of them. Then do the same with plasma cores, and all your other explosives (vehicles work too). Once you have all these laid out in rows, you can set off an infinite explosion. This does not work UNLESS all objects have their run time minimum to four.	Edit Delete
ELEPHANT GO BOOM!!! I'm sure all of you have seen the youtube video "ELEPHANT GO BOOM!!!" Anyway, this is how to do it. Inside an elephant, set up the 'infinite explosions' effect outlined above. Pack as many explosives inside as possible. For added effect set some trip mines to instant respawn on the elephant control panel as. Throw them down into the mess of explosives -- But not too many! Then just throw a grenade and sit in the mini control panel room thing so you don't fall out too quickly. Also, for an even more spectacular effect, place anything that will make sure things don't fall out on the "doors" of the elephant (as seen in the video) and instant respawn on them as well ;)	Edit Delete
Map Overload This can be seen especially on Valhalla, Sandtrap, and Snowbound. Spawn four trip mines on instant respawn and start throwing them. When there are so many there is a pile about as high as your knees all around you (ok maybe you don't need that many but make sure at least two trip mines are piled on top of one another all around you) toss in a grenade. This does a few things. Your map is overloaded, grav lifts/mancannons will not work Guardians do not work You can be the Guardians in Snowbound The barriers are nulled -- you can get out of any map Death barriers are also nulled, you can get out of any map without dying Several things will disappear (elephants, bridge on narrows, etc) No vehicle ceiling -- you can fly into space And lastly, you will get the pleasure of watching your body fly extremely high while a large explosion occurs around you. For best effect, throw grenades at your feet.	Edit Delete
Caught in the Act On the final level of the game, "Halo", go to the place where you will normally get the terminal. Then go to the place where there is a huge gap and a laser between you and the other side. Grenade jump to the other side (bottom or top) and walk in and to the far left there will be a half naked dude dancing.	Edit Delete
Get out of High Ground Spawn a mongoose. Get on back. Have a friend push you through the barrier. Get off. Spawn teleport if you want. Don't go too far. The end.	Edit Delete
Get out of Isolation Push teleport through the metal wall. Then just walk through another teleporter. Don't go too far. The end. PS - there is a room where you can hide if you want.	Edit Delete
Confuse Your Enemy! Melee attack right after you reload a carbine. Your carbine won't fully reload and you can keep doing it. All the little carbine ammo casings will be scattered behind you. This is good for confusing the enemy long enough to attack from behind ;)	Edit Delete
Credit: I ripped a few of these tips off from the Halo 3 tricks team (Sorry CMNier!). Most of these are common, and some are really easy to figure out yourself, bit he only ones I copied straight from Halo 3 tricks were 'Caught in the Act,' 'Get Out of Isolation,' and 'Confuse the enemy.' Go watch the show yourself -- you will learn quite a bit.