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Step 1
Play the game in Campaign mode on the Legendary difficulty level to use these cheats.
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Step 2
Make your allies impervious to your enemy's melee assaults by reaching the High Charity level. Once you get to the final grav lift, you'll notice a skull float past you as you rise. If you push the X button as it passes, your allies will gain immunity to melee damage.
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Step 3
Get energy back when you engage in melee combat against an enemy. Begin at the Great Journey level. When Sgt. Johnson shoots at the tower, take your banshee and jump onto the slope opposite the tower. On the ledge opposite the slope, you'll notice several spires connected to the building. Climb to the top of the one connected to the door you would use to enter the tower. At the top you'll find a skull, which makes it so that your shields only recover when you are in melee combat with your foes.
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Step 4
Find the Sputnik Skull on the Quarantine Zone level to make explosions and melee combat even fiercer. At the beginning of the level, turn behind you and follow the tunnel to the cliff. Angle to your left and find the rock wall. It contains a small ledge where you can grab the Sputnik Skull.
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Step 5
Use game cheats to make the Covenant turn silver and slightly more difficult with the Thunderstorm Skull. On the Cairo Station level, pass the armory, pass the loading docks and enter the next room. At the room's highest point, you will find a trash can. Look underneath it, and you'll find what's called the Thunderstorm Skull just sitting there.
