Killjoy is a medal obtainable in Halo 3 and Halo: Reach Multiplayer. To obtain this medal you must kill somebody who is on an Killing Spree or any other known spree (Killing Frenzy, Running Riot, Rampage, Untouchable or Invincible). It is represented by an octagon with a crossed-out smiley face in the middle. This medal is very random as you don't know which players are on killing sprees, unless of course, one has killed you or your team multiple times without dying. A good way to see this through is to look for a sniper who is sniping other people. Go to an inconspicuous location and snipe him.

The Awww, Too Bad achievement can be gained by getting a Killjoy on one of the Mythic Maps.

GalleryEdit

	Halo 3 Multiplayer Medals
Special	Perfection • Extermination
Sprees	Killing Spree • Killing Frenzy • Running Riot • Rampage • Untouchable • Invincible
Weapon Sprees	Shotgun Spree • Sword Spree • Sniper Spree • Splatter Spree • Open Season • Slice 'N Dice • Sharpshooter • Vehicular Manslaughter
Consecutive Kills	Double Kill • Triple Kill • Overkill • Killtacular • Killtrocity • Killimanjaro • Killtastrophe • Killpocalypse • Killionaire
Special Kills/Vehicular Medals	Beat Down • Assassin • Sniper Kill • Grenade Stick • Laser Kill • Oddball Kill • Flag Kill • Incineration • Killjoy • Death from the Grave • Splatter • Highjacker • Bulltrue • Wheelman • Skyjacker • Killed Vehicle
Objectives	Last Man Standing • Killed Flag Carrier • Flag Score • Killed Juggernaut • Killed VIP • Killed Bomb Carrier • Bomb Planted
Objective Sprees	Hail to the King • Infection Spree • Zombie Killing Spree • Juggernaut Spree • Mmmm Brains • Hell's Janitor • Unstoppable
Bungie.net Only	Steaktacular • Linktacular

[[Image:{{{1}}}|{{{2}}}px]]	Halo: Reach Multiplayer Medals
Sprees	Killing Spree • Killing Frenzy • Running Riot • Rampage • Untouchable • Invincible • Inconceivable • Unfrigginbelievable Hammer Spree • Dream Crusher • Wrecking Crew • Shotgun Spree • Open Season • Buck Wild • Sniper Spree • Sharpshooter • Be the Bullet • Stick Spree • Sticky Fingers • Corrected • Sword Spree • Slice 'N Dice • Cutting Crew • Splatter Spree • Vehicular Manslaughter • Sunday Driver • Wheelman Spree • Road Hog • Road Rage • Laser Spree • Red Menace • Sunburst • Assist Spree • Sidekick • Second Gunman • Juggernaut Spree • Immovable Object • Unstoppable Force • Infection Spree • Mmmm... Brains • Thriller • Zombie Killing Spree • Hell's Janitor • Hell's Jerome • Spawn Spree • Wingman • Broseidon
Consecutive Kills	Double Kill • Triple Kill • Overkill • Killtacular • Killtrocity • Killimanjaro • Killtastrophe • Killpocalypse • Killionaire • Skullamanjaro
Style Medals	Avenger • Close Call • EMP Blast • Extermination • Firebird • First Strike • Headcase • Headshot • Hero • Needle Combine Kill • Opportunist • Perfection • Protector • Rejection • Reload This! • Revenge • Showstopper • Splatter • Yoink
Miscellaneous Medals	Assist • Beat Down • Pummel • Bulltrue • Flag Kill • Hail to the King • Hijacker • Kill from the Grave • Killed Juggernaut • Killjoy • Laser Kill • Pull • Oddball Kill • Skyjack • Sniper Kill • Splatter • Grenade Stick • Wheelman • Flag Score • Killed Oddball Carrier • Last Man Standing
Bungie.net Medals	Steaktacular • Linktacular • Avenge Me • Thank the Maker • Bros to the End • Triple Double • Funkadelic • Party Animal • Love Machine • Big Game Hunter • Wildcat Destabilizer • Seek and Destroy • H. Ryan Memorial • Ennobled