Halo 3 Unlockables
editUnlockable How to Unlock
Askar (10)-Score over 15,000 points in the Campaign meta-game on the fourth mission.
Assault (30)-Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary.
Black Eye (10) Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Campaign Complete:-Heroic (125) Finish the Campaign on Heroic (normal is unlocked as well).
Campaign Complete:-Legendary (125)-Finish the Campaign on Legendary (normal and heroic are unlocked as well).
Campaign Complete: Normal (125)-Finish the Campaign on Normal.
Catch (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Cavalier (10)-Score over 15,000 points in the Campaign meta-game on the third mission.
Cleansing (30)-Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary.
Demon (10)-Score over 15,000 points in the Campaign meta-game on the second mission.
Exterminator (10)-Score over 15,000 points in the Campaign meta-game on the fifth mission.
Famine (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Fear the Pink Mist (5)-Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
Fog (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Graduate (10)-Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online).
Guerilla (10)-Score over 15,000 points in the Campaign meta-game on the first mission.
Headshot Honcho (5)-Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
Holdout (20)-Finish the second mission of the Campaign on Normal, Heroic, or Legendary.
Iron (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Killing Frenzy (5)-Kill 10 enemies without dying in any ranked free for all playlist (Online).
Landfall (20)-Finish the first mission of the Campaign on Normal, Heroic, or Legendary.
Last Stand (40)-Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary.
Lee R Wilson Memorial (5)-Score 5 grenade sticks in any ranked free for all playlist (Online).
Marathon Man (40)-Locate and access all Terminals in the Campaign.
Maybe Next Time Buddy (5)-Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
Mongoose Mowdown (5)-Splatter an enemy with the mongoose in a ranked free for all playlist (Online).
MVP (5)-Earn the MVP in any ranked playlist (Online).
Mythic (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Orpheus (10)-Score over 15,000 points in the Campaign meta-game on the eigth mission.
Overkill (5)-Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Ranger (10)-Score over 15,000 points in the Campaign meta-game on the sixth mission.
Reclaimer (10)-Score over 15,000 points in the Campaign meta-game on the final mission.
Refuge (30)-Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary.
Return (50)-Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
Spartan Officer (25)-Advance to the Spartan Officer ranks (Online).
Steppin' Razor (5)-Score a Triple Kill with the sword in a ranked free for all playlist (Online).
The Key (40)-Finish the eigth mission of the Campaign on Normal, Heroic, or Legendary.
The Road (20)-Finish the third mission of the Campaign on Normal, Heroic, or Legendary.
Thunderstorm (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Tilt (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Too Close to the Sun (5)-Destroy an enemy banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Tough Luck (10)-Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Triple Kill (5)-Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Two for One (5)-Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
UNSC Spartan (15)-Earn your Sergeant rating to be recognized as a true Spartan (Online).
Up Close and Personal (5)-Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online).
Used Car Salesman (5)-Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign.
Vanguard (10)-Score over 15,000 points in the Campaign meta-game on the seventh mission.
We’re in for Some Chop (5)-Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Armor Permutations Unlockables
editBody Pieces: Spartan marked with (S) and Elite marked with (E). Unlockable How to Unlock (E) Ascetic Body -Unlock "Up Close and Personal" Achievement
(E) Ascetic Head -Unlock "Steppin' Razor" Achievment
(E) Ascetic Shoulders -Unlock "Overkill" Achievment
(E) Commando Body -Unlock "Triple Kill" Achievement
(E) Commando Head -Unlock "Overkill" Achievment
(E) Commando Shoulders -Unlock "Killing Frenzy" Achievment
(E) Flight Body -Complete Tsavo Highway On Herioic or Legendary
(E) Flight Head -Complete Campaign mode on Heroic difficulty.
(E) Flight Shoulders -Complete The Ark on Heroic difficulty or higher.
(S) EOD Body -Complete Tsavo Highway on Legendary
(S) EOD Head -Complete Campaign mode on Legendary Difficulty
(S) EOD Shoulders -Complete The Ark on Legendary difficulty
(S) EVA Body -Complete Tsavo Highway on Normal or higher
(S) EVA Head -Complete Campaign mode on Normal
(S) EVA Shoulders -Complete The Ark on Normal difficulty or higher.
(S) Mark V Head -Unlock "UNSC Spartan" Achievment
(S) ODST Head -Unlock "Spartan Graduate" Achievment
(S) Rogue Head -Unlock "Spartan Officer" Achievment
(S) Scout Body -Unlock "Too Close to the Sun" Achievement
(S) Scout Head -Unlock "Used Car Salesman" Achievment
(S) Scout Shoulders -Unlock "We're in for Some Chop" Achievment
(S) Security Head -Earn 1000 Gamerscore points.
(S) Security Shoulders -Earn 250 Gamerscore points.
Secrets
editBlack-Eye Skull
Effect: Melee hits instantly recharges your shield.
Where to find: Crow's Nest
How to find: As soon as you start the level, head straight up to the higher level. Head toward the door with the red light, then turn around. Jump onto the racks, onto the red metal light holders, then onto the ventilation tube. The skull will spawn at the end.
Blind Skull
Description: "Shoot from the hip"
Stage: First Stage
How To Find: When you get to the area where you see the Phantom overhead (one of the marines will point it out) jump over the rocks and keep following the path on the right. When you get to the cliff there will be a rock over of the side. The skull is on the end of the rock.
Note: This skull has to be Activated before you start a Campaign map.
Catch Skull
Mission: The Storm
Effect: "Pull pin. Count to three. Throw." -- Every NPC carries two grenades and throws them often.
You can get this by performing a grenade jump off a warthog, or grab a ghost and go back to the ramp from which you first came out, using the ghost to push a big square crate back over to the front of the silo pod that the skull is on top of, then use the box as a place to jump from.
Cowbell Skull
Effect: Explosive force increased (sputnik from H2)
Level: The Ark
Location: First pick up a grav lift from the small building near where you fight the scarab. Now proceed through the level until you reach the second sloping hallway (stairway), you should see some partitioned risers (platforms) halfway down. The skull is on the top level. Toss the grav-lift on the right side of the hall so it lands on the fourth little green dot from the door. Then run, jump, and use the grav-lift to propel you to the top. You should reach a ckeckpoint just as you enter the room so it you miss just try again.
Famine Skull
Mission: The Ark
Effect: "Trust us. Bring a magazine." -- Dropped weapons will have very little ammo compared to normal.
When you first go into the valley to the right after the wrecked phantom, look to your left where you will see a huge boulder. Use a ghost and get to the side of the boulder that is closest to the bridge overhead. It is easy to pilot the ghost up the side of the wall using the thrust. To get the skull, pilot 2 ghosts up the wall to the top of the bridge and stack them one on top of another next to the beam where the skull is placed. Simply jump from the top of the ghosts towards the skull and land on the beam.
Fog Skull
Mission: Floodgate
Effect: "You’ll miss those eyes in the back of your head." -- Your motion sensor disappears.
As you are walking down from the anti-air gun you destroyed in the previous mission, you encounter a ramp (next to a missile launcher). Around this ramp, you hit a checkpoint. At this point, you should also hear a marine yelling, “There! Over There!”. Look up and to the right, directly at the roof of the building next to the missle launcher. There is a single flood form (not to be mistaken with the two other flood forms jumping in front of you) which is holding the skull. Kill him before he jumps, and he will drop the skull down to the ground where you can retrieve it. Too early, and the skull will get stuck on the roof though, so just time it carefully.
Grunt Birthday Party skull
Effect: Headshots cause enemies to explode.
Where to find: Crow's Nest
How to find: Right after the first objective, while en route to the barracks, you will fall down onto a pipe. At the end of this pipe, look over the edge to see a small space a few feet below you. You must simply drop over and as quicly as you can, pull back to land under the floor you were just on. After that, the skull will be at the end.
Iron Skull
Effect: When either player dies in Co-Op on any difficulty both players will restart at last check point.
Where to Find: Spartan 117
How to find: In the area where you rescue Sarge, behind the prison cell is a large ledge. Got to the far right side and jump on the boxes, then onto the pipes to get up on the ledge, goto the far end of the ledge, turning two corners the skull is at the far end.
Mythic Skull
Effect: Every enemy on the field now has double their normal amount of health.
Where to find: Halo
How to find: As soon as the mission starts walk up the hill in front of you and into the cave. Hug the right side of the cave and after a large boulder you will see a path on your right, just take the short path and it will be at the end.
The 7 Terminals
The Ark:
1. Start the mission and once you enter the first building take a left into another door and now you should be in a curved corridor. On the inside is a Terminal. 2. After activating the bridge to let your comrades accross the gap, do a 180 and you should see it. (it does not open until you activate the bridge) 3. In the third building after defeating the scarab, kill the group of sleeping covenant, then follow the corridor downwards. Once you reach a door in front that is locked, immediately on the left there's an open door. Go through and walk straight off, then do a 180 to find a secret room. It is in there.
The Covenant:
1. When in the first tower standing on the lift, face the access panel and turn left. Jump over and it's right there. 2. Land your hornet on the second tower, walk towards the entrance but when you see the locked door, do a 180. Should be right in front of you. 3. When in the third tower standing on the lift, face the access panel and turn right. Jump over and it's right there.
Halo:
1. After reaching the end of the first cave, hug the right wall and you will see a building. Jump up onto the walkway and hang a left once inside. It's right there.
Thunderstorm Skull
Mission: The Covenant
Effect: "Field promotions for everyone!" -- Upgrades enemies to their stronger versions.
After you shut down tower 1 and get access to the hornet, fly to tower 2 (the one the arbiter shut down). While walking up the stairs, go to the middle part that connects both and there should be a stair leading up to a platform where the skull is.
Tilt Skull
Mission: Cortana
Effect: "What was once resistant is now immunity" -- Enemies have different body parts that may be resistance to certain bullet types
When in the circular type room with all the flood look for a small structure piece next to two archways, jump on top if it and up on the rocks to the top left, turn left and jump up again, then do a 180 and jump to the rocks across from you. After that follow the the rock sticking out and leading up on top of of the original circular room, the skull will be in a pile of blood.
Tough Luck Skull
Effect: Enemies do saving throws
Where to find: Tsavo Highway
On Tsavo Highway, about halfway through the mission (right after you are forced to walk through a large blue barrier), you will come out of a tunnel on the highway, and see a large pipeline on your left. Drop down in between the two, and run to the wall in front of you. Follow the wall all the way to where it connects with the cliff on your right, and turn to the left. There should be a few ledges--simply crouch jump from ledge to ledge, and the last one should have the "Tough Luck" skull on it.