A list of the Skill and Experience needed to advance in rank. Note: you can skip ranks once there is a set skill requirement. For example, many people go from Lieutenant Grade 2 (Skill:10 EXP:85) straight to Captain (Skill:20 EXP:100)
If you do the following things you will get the medal while playing multiplayer. When you do the task usually it will show you by a little icon of the said medal appearing in the corner of the screen. Also at the end of each match you can check what medals you got. You can also check your overall medal count on bungie's official website. A very small amount of these are secret medals in that they don't tell you right when you get them but they will appear in your medal history. (One example of such a medal is the Steaktacular! Medal)
How to Unlock
Hit and kill an opponent with a melee attack from behind.
Hit and kill an opponent with a melee attack.
Plant the bomb in a Assault Gametype.
Kill an opponent who is in the act of a sword lunge.
Death from the Grave!
Kill an opponent after you have died.
Kill 2 opponents within 4 seconds of each other.
Get an overkill on the opposing team, wiping out all of the members.
Get a melee kill with the flag in a CTF gametype.
Capture the opposing team's flag in a CTF gametype.
Kill an opponent by sticking him/her with a Plasma Grenade or a Spike Grenade.
Hail to the King!
Kill 5 consecutive opponents in a single life from inside the hill before it moves in a King of the Hill gametype.
Kill 10 zombies in a row as a human without dying in an Infection gametype.
Board an enemy ground vehicle.
Kill an opponent by using the Flamethrower.
Kill 5 humans in a row as a zombie without dying in an Infection gametype.
Kill 30 opponents in a row without dying.
Kill 5 consecutive opponents in a single run as the Juggernaut in a Juggernaut gametype.
Kill 9 opponents within 4 seconds of each other.
Killed Bomb Carrier!
Kill the opposing bomb carrier in a Assault Gamtype.
Killed Flag Carrier!
Kill the opposing flag carrier in a CTF gametype.
Kill the Juggernaut in a Juggernaut gametype.
Kill the opposing VIP in a VIP Gametype.
Kill 7 opponents within 4 seconds of each other.
Kill 10 opponents in a row without dying.
Kill 5 opponents in a row without dying.
Kill 10 opponents within 4 seconds of each other.
End an opponent's killing spree—any spree.
Kill 5 opponents within 4 seconds of each other.
Kill 8 opponents within 4 seconds of each other.
Kill 6 opponents within 4 seconds of each other.
Kill an opponent by using the Spartan Laser.
Last Man Standing!
Be the last human of the game in an Infection gametype.
Play in a matchmade game comprised of all Bungie.net users. (Secret Medal)
Kill 10 humans in a row as a zombie without dying in an Infection gametype.
Get a melee kill when holding the ball in a Oddball gametype.
Gun down 10 opponents with a Shotgun in a row without dying.
Kill 4 opponents within 4 seconds of each other.
Win a slayer game with 15+ kills without dying.
Kill 20 opponents in a row without dying.
Kill 15 opponents in a row without dying.
Snipe 10 opponents in a row without dying.
Gun down 5 opponents with a Shotgun in a row without dying.
Board an enemy aircraft.
Slice 'N Dice!
Cut down 10 opponents with the Plasma Sword in a row without dying.
Kill an opponent with a headshot by using a sniping weapon.
Snipe 5 opponents in a row without dying.
Splatter 5 opponents in a row without dying.
Hit and kill an opponent with a vehicle.
Beat the opposing team by over 20 kills; (Luke owes you a steak dinner) (Secret Medal)
Cut down 5 opponents with the Plasma Sword in a row without dying.
Kill 3 opponents within 4 seconds of each other.
Kill 10 consecutive opponents in a single run as the Juggernaut in a Juggernaut gametype.
Kill 25 opponents in a row without dying.
Splatter 10 opponents in a row without dying.
Be the driver of a vehicle when a passenger kills an opponent.
Zombie Killing Spree!
Kill 5 zombies in a row as a human without dying in an Infection gametype.
In Sandbox, fly to the heighest possible point in the map. Look around till you can see the sun (not the "red light" on one side of the map) on the horizon, inbetween two Guardian towers. Turn right and face inbetween the next pair of Guardian towers (so the tower on the right of the sun is now the tower on the left). The skull is located outside of the map in this direction. If you are having trouble spotting it, try and use the zoom of a sniper rifle or beam rifle.
There are several methods of obtaining the skull. You can use bubble shields, tube pieces and shield doors to form a tunnel, or you may fly over the skull and drop a teleporter exit so you can teleport to it directly. There are also several maps you can download on fileshare to gain easy access to the skull.
Load up Orbital in forge mode, find the open area (the place with the two traffic cones and a pit you can fall down). In monitor mode (press up on the d-pad), fly all the way to the top and the skull is lying on a vent in one of the corners.
Load up Assembly in forge mode and go into monitor mode (press up on the d-pad). There are two "arms" attatched to the centre building. In monitor mode, fly up and into the small opening at the top of the arm (it's one of the two).
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.
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.
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.
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.
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.
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.
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.
Effect: "But the dog beat me over the fence" - Unlocks bonus dialogue throughout the game. For most, this is the last skull, so this gives you the Hayabusa Helmet as well.
To get this, get to the room where you "fight" the Prophet of Truth. Let the Arbiter kill him, turn around, and kill all the Flood here as well; makes it a LOT easier. With all obstacles out of the way, you need to jump through the Halo holograms here in a specific order, listed below:
4 6 5 4 5 3 4
When you jump through the final hologram, they all light up in a sequential pattern. The Skull will be at the end waiting for you right before the energy bridge leading to Truth's corpse.
Effect: When either player dies in Co-Op on any difficulty both players will restart at last check point or in single player if you die you restart the level.
Where to Find: Sierra 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.
Effect: Headshots on grunts cause heads to explode with confetti.
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.
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.
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.
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.
Effect: all enemies have 2 grenades, throw more grenades
Level: The Storm
Location: From the start, go through until you go outside again. When you go outside look straight across there is a small round building straight out there, the skull is on top. In order to get up there you can either use a warthog as a platform or grenade-jump. DO NOT destroy the wraith near the door or the skull will disappear.
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.
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.