|Length||3:31, 5:19 (Grand Omega Bosses edit)|
|First live performance||8th April 2005|
|Latest live performance||2nd July 2007|
|Chart position||6 (download)|
Perhaps the Muse song that most reminds of Daron Malakian's Armenian-tinged metal guitar playing. Bellamy's stabby guitar riffs are accompanied by a heavy bass line and thrashing drums. There are portions of the song where the drumming is the most audible, as in "Map of the Problematique". The vocals were overdubbed by Matt multiple times to create a barbershop quartet effect, complete with staccato "You-ou-ou-ou-ou"'s and harmonized 7th chords. The bridge section of the "Grand Omega Bosses edit" resembles the band's rendition of "Prelude In G Minor". The full length version of Assassin (Grand Omega Bosses edit) is very similar in structure to 1997 demo version of "Ashamed".
"Assassin" was formerly known as "Debase Mason's Grog" ("Message Board Song"), and before the finalisation of the album's track list, Demonocracy. Demonocracy means the power or government of demons.
Bellamy has said this is a "kind of take a gun out and kill somebody" style song. Early reviews prior to the album's release described the introduction with reference to the Knight Rider theme music.
Several major changes were made to the song compared to earlier live versions from 2005. Previously, it had a longer, more distorted intro, more varied percussion, most prominently contained a slow bridge between the first and second chorus, and was generally more progressive. The original drumming was used in "Map of the Problematique".
The song is featured in the 2008 game Guitar Hero: World Tour as a playable track, where there is also a secret achievement for the 360 version of the game called "Muse to My Ears", requiring you to score 222,222 points or higher on Assassin, playing the drums. 
During recording, the bass drum had a "few" extra microphones, to record the "most definition possible". These microphones for the bass drum included one inside the drum and two outside. Capacitor microphones were used for the snare drums.
An extended version of the song was reintroduced during the 2006 tour. This version includes a modified version of the omitted interlude, with different percussion and no vocals. While there are reports both of the interlude being placed in its original position and of extensions comprising of parts of the original version, these claims cannot be substantiated and some of these claims contradict the recordings. Wolstenholme screams the line "Aim, shoot, kill your leaders" during the solo that's on the album.
It was reported that an extended version of "Assassin" was to be the B-Side for the "Knights of Cydonia" single on the offical Muse site. This was later clarified to be for B-Side to the vinyl and non-preordered digital formats, and that the name of it is "Grand Omega Bosses edit". Grand Omega Bosses is an anagram for 'Debase Masons Grog', or 'Message Board Song', a former title during the 2005 cryptography game, used to signify the then-untitled, extended version of "Assassin" on a set list. This version reinserts the interlude and lyrics featured in the 2005 live version, as well as adding a piano part during said interlude.
The "Grand Omega Bosses edit" adds some depth to the interpretation of the song. Instead of one resisting alongside others (as in "join forces underground"), the importance of taking action before the isolation of resistance can be overcome is strengthened in the lyrics of the bridge (see "You're not alone / But you must actualise / The first attack"). Whilst at 3:11 Bellamy can be heard saying 'Go!' in the album version, this was removed on the "Grand Omega Bosses edit".
The piano part within the 'Debase' interlude was added prior to the shortening of the song, rather than afterwards. Costey revealed that the band had been planning to release the "Grand Omega Bosses edit" for some time prior to its release.
War is overdue The time has come for you To shoot your leaders down Join forces underground Lose control And increasing pace Warped and bewitched Time to erase Whatever they say These people are torn Wild and bereft Assassin is born, yeah Aim, shoot, kill your leaders Aim, Kill them all Oppose and disagree Destroy demonocracy Lose control And increasing pace Warped and bewitched Time to erase Whatever they say These people are torn Wild and bereft Assassin is born, yeah
Grand Omega Bosses edit
War is overdue The time has come for you To shoot your leaders down Join forces underground Lose control And increasing pace Warped and bewitched Time to erase Whatever they say These people are torn Wild and bereft Assassin is born, yeah Aim, shoot, kill your leaders They'll try to steal your life So watch your back You're not alone But you must actualise The first attack Oppose and disagree Destroy demonocracy Lose control And increasing pace Warped and bewitched Time to erase Whatever they say These people are torn Wild and bereft Assassin is born, yeah
War is overdue Time has come for you To shoot your leaders down Truth's crumbling now (Appears to say "Pray on holy ground" on St.Louis version) Lose control Lose your faith Lingering hours Time to erase Lose control Lose your faith Lingering hours Turn to the grave They'll try to steal your life So watch your back You're not alone But you must actualise The first attack War is overdue I struggle for you Lose control Lose your faith Lingering hours Time to erase Lose control Lose your faith Lingering hours Turn to the grave
The following second verse was sung instead:
Destroy and disagree Cut down demonocracy
- ↑ San Antonio Sunset Station 2005 set list (2005-05-03). [verify]
- ↑ Dallas Gypsy Ballroom 2005 set list (2005-05-04). [verify]
- ↑ Album notes
- ↑ Dave Walker. (2007-01-13). Muse, Leona and Depeche Mode top the download charts for 2006. Techdigest.tv. Retrieved from techdigest.tv.
- ↑ Typlo. (2002-07-07). Muse - Screenager [Live Eurockéennes 2002]. YouTube. Retrieved from youtube.com.
- ↑ a b Philadelphia Liacouras Center 2005 set list (2005-04-15). Muse. [verify]
- ↑ Tom. (2006-03-15). Muse featured in NME and Kerrang!. MuseLive.com. Retrieved from muselive.com.
- ↑ Interview with Colin Murray (2006-10-05). BBC Radio 1. [verify]
- ↑ Muse: Black Holes And Revelations (2006-06-30). Drowned in Sound. [verify]
- ↑ Robert Workman. (2008-09-12). Guitar Hero World Tour Full Set List Revealed. GameDaily. Retrieved from www.gamedaily.com.
- ↑ Guitar Hero World Tour Achievement List. Xbox 360 Achievements. Retrieved from Xbox 360 Achievements.
- ↑ a b Jeff Touzeau. (2007-03). An Evening with Rich Costey. EQ. [verify]
- ↑ muselive.com 20060924
- ↑ Hyundai Pavilion 20060923
- ↑ muse.mu News 20061017
- ↑ muse.mu News 20061107