All you have to do is forge it.
Before starting the game while in game settings [making the gametype] look around there to fins "custom power ups" to adjust the effects of picking up a red "custom power up"
You sign in (below site) and make a challenge. Very easy.
gaining the speed power up
Yes, if you pick up a custom power-up (yellow orb) whitch are not on default maps but only player created maps if the settings are correct you can become invincible
Go in forge and click button x and then after making one save it and it should show up in custom games =)
Re-build your diesel. Put on a custom chip and that will make up for engine power loss.
Lego Halo as a theme doesn't exist. However, many people custom Lego to create Halo helmets, figures etc. Try typing it into eBay to see what it comes up with.
If youhave the "Halo 3 Mythic" it does not let you play campaign but if you have "halo 3" your disc is broken but on halo 3 mythic campaign isn't on that disc. Add me on xbox live im Mr quiggels
They never released a second Halo 1 and Halo: Combat Evolved is Halo 1. My source is Wikipedia; type in Halo 1, it will come up with Halo: Combat Evolved.
You can't. They took off the "Indestructible Vehicles" option that they used to have in halo 3. :[
in halo 3 you start up a custom game and go under game types and go under infection and play on of the default types or make your own, then a get a few people to play with you and during one round you will maybe be infected.
Either get wifi or ethernet hooked up to your xbox and go into matchmaking or for two player offline just go to custom game.