From Halopedia, the Halo wiki
Killing Spree • Killing Frenzy • Running Riot • Rampage • Untouchable • Invincible • Inconceivable • Unfrigginbelievable • Comeback
Double Kill • Triple Kill • Overkill • Killtacular • Killtrocity • Killamanjaro • Killtastrophe • Killpocalypse • Killionaire • Extermination
Kill • Headshot • Melee • Beat Down • Assassination • Airsassination • Grenade Kill • Plasma Kill • Sniper Rifle Kill • Beam Rifle Kill • Binary Rifle Kill • Rocket Kill • Fuel Rod Cannon Kill • Railgun Kill • Sword Kill • Hammer Kill • Splaser Kill • Supercombine • Vehicle Kill • Splatter
First Strike • Last Strike • Headcase • Reload This • Kill from the Grave • Revenge • Retribution • Vengeance • Avenger • Protector • Close Call • Hijack • Skyjack • Busted • Showstopper • Bulltrue • Vehicle Destroyed • Killjoy • Hail Mary • Snapshot • Ordnance Earned
Assist • Vehicle Destroy Assist • Wheelman • Distraction • Guardian Angel • Wingman • Bodyguard • Flyin' High • EMP Assist • Road Trip
Base Capture Initiated • Base Captured • Base Conqueror • Capture Assist • Capture Initiation Assist • Base Defense • Base Offense • Base Saved • Security Chief • Fortification Assist • Resupply Assist • Turret Built • Chief Engineer • Turret Destroyed • Demolition Expert • Gotcha! • Shield Door Destroyed • Breach • Sapper • Survivor • Hero! • Kill Shot!
King Kill • King Spree • Kingtacular • Reign of Terror • Regicide • Execution • King Slayer • King Joust • King Assist • Savior
Flood Conversion • Alpha Conversion • Infector • Carrier • Juggernaut • Gravemind • Flood Kill • Flood Kill Assist • Flood Hunter • Flood Survivor • Flood Exterminator • Last Man Standing • Final Conversion • Flood Victory • Ancient One • Clever
Hill +5 • Hill +10 • Hill +15 • Hill Dominance • Vehicle Hill +5 • Vehicle Hill +10 • Vehicle Hill +15 • Vehicle Dominance • First Point • Hill Defense • Hill Offense • Hail to the King • Hill Assist • Regime Change
Flag Capture • Flag Runner • Flag Champion • Flag Assist • Flag Carrier Kill • Flag Defense • Flagsassination • Flag Kill • Flag Joust • Flag Driver
Ball Holder • Ball Keeper • Ball Master • Ball Hog • Magic Hands • Ball Kill • Smooth Moves • Ballsassination • Carrier Kill • Carrier Kill Assist • Catch • Long Bomb • Nice Catch! • Interception • First Touch
Site Extracted • Extraction Assist • Beacon Armed • Arm Assist • Arm Stopped • Beacon Converted • Convert Assist • Convert Stopped • Expert Extraction • Site Saviour • Site Offense • Site Defense • Stay Back!
Score!