Campaign scoring

From Halopedia, the Halo wiki

Campaign Scoring, also known as Meta-game, is an optional game feature for the campaign mode of Halo 3.

When playing with Campaign Scoring turned on, the player plays a normal campaign mission (single player or cooperative), but progress is scored with points for notable activities. Having skulls activated increases the amount of points gained, as well as accuracy and kill count. Different enemies give different points as do headshots (and assumably any other kill that would be worth a medal). Betrayals will cause negative points so cooperative work will be necessary. To find out more about campaign scoring, listen to mission Design Lead Paul Bertone on the Bungie podcast [1].


Free-for-all vs. Team Scoring

In Free for All scoring, points are awarded to individual players based on their kills. Points earned in this mode can be used to unlock the meta-game achievements.

In Team Scoring, points are shared among the team, culminating in a cumulative team score.


Point Values

Points are earned by killing enemies, with the player shooting the killing shot (or throwing the killing grenade) earning the points. Following is a list of base points earned for killing enemies (i.e. without any multipliers).
Covenant
Heroes
Brute Chieftain (Weapon/Armor Variants) 150
Leaders
Brute Captain 50
Brute Captain Major 50
Brute Captain Ultra 50
Specialists
Brute Stalker 30
Brute Jump-pack 30
Brute Bodyguard 30
Jackal Sniper 20
Grunt Heavy 10
Grunt Spec-Ops 10
Hunter 150
Infantry
Brute Minor 20
Brute Major 20
Brute Ultra 20
Grunt Minor 10
Grunt Major 10
Jackal Minor 15
Drone Minor 10
Drone Major 10
Flood
Specialists
Pure Form Stalker 20
Pure Form Ranged 30
Pure Form Tank 50
Infantry
Flood Carrier Form 10
Combat Form (Human,Brute,Elite) 10
Forerunner
Infantry
Sentinel Aggressor Minor 5
Vehicles
Light
Shade 50
Ghost 100
Chopper 100
Standard
Prowler 150
Banshee 100
Heavy
Wraith (Both Variants) 200
Phantom 250
Giants
Scarab 500

Multipliers

Difficulty Multipliers

Overall
Difficulty Multiplier
Easy 0.25x
Normal 1x
Heroic 2x
Legendary 4x

Skull Multipliers

Overall
Skull Multiplier
Iron (Start from beginning) 3x
Black Eye (Melee for shields) 1.5x
Tough Luck (Enemy saving throws) 1.5x
Catch (Enemy grenades) 1.5x
Fog (No motion sensors) 1.5x
Famine (Half ammo dropped) 2x
Thunderstorm (Enemy promotions) 1.5x
Tilt (Stronger enemies) 2x
Mythic (Double enemy health) 2x

Time Multipliers

Overall
From 3.0x to 1.0x, decreasing by 0.5x as time passes.


Style Multipliers

Per-kill
Style Multiplier
Grenade Stick 1.25x
Headshot 1.25x
Assassination (Stealth kill) 1.25x
Road Kill (Run over enemy) 1.25x
Multi-kill (at least 3 enemies within 1.5 seconds) 1.25x
Needler Detonation 1.25x
EMP (noob combo) 1.25x

Scoring Formula

The Formula for Campaign Scoring is:

Points Earned = Unit's base point value X (Style Multiplier + Occasional 2nd Style Multiplier) X (Difficulty Multiplier + Skull Multipliers) X Time Multiplier

Achievements

Achievement Name Points Required Level
Guerilla 15,000 Sierra 117
Demon 15,000 Crow's Nest
Cavalier 15,000 Tsavo Highway
Askar 15,000 The Storm
Exterminator 15,000 Floodgate
Ranger 50,000 The Ark
Vanguard 50,000 The Covenant
Orpheus 15,000 Cortana
Reclaimer 15,000 Halo

References

Bungie Online

Halo 3 How-to: Campaign Scoring 101

Get the Most Out of Skulls