Well I made this so you can share small things you do in campaign. Here is the mine, okay if I have a powerweapon that is almost out of ammo I usually give it to a marine because when they have a weapon it has infinite ammo.
Use the Sputnik skull to reach places outside of the Map to watch the enemys fight eachother.(Gravemind)
At the start of Outskirts (Halo 2 )kill enemies from the roof where the blind skull is