Killer 7 was published and developed by Grasshoper Manufacture and Capcom. Released on June 9th, 2005 in Japan, July 7th in US and 15th July for Europe. Killer 7 was highly anticipated due to its original artistic style and gameplay.

The game was written and directed by Goichi Suda, also known as Suda51, and produced by Shinji Mikami. Mikami is well known for being the creative force behind a group of stylish, original titles including Resident Evil, Viewtiful Joe, and Devil May Cry.

The title revolves around Harman Smith, a sixty-year-old assassin who is bound to a wheelchair. He is capable of manifesting seven personalities into the real world, each with their own personal style of killing; the group is collectively known as the Killer7. The dominant personality is Garcian Smith, who, while in the presence of security cameras or television sets, has the ability to call upon the six other members of the Killer7 at any time, and also the only one who can communicate with Harman Smith. Unlike most multiple personalities in fiction (and all real forms of the disorder), Harman does not just think he is someone else; rather, his personae actually take on a unique physical body when called upon.

The '7' of the Killer7 Syndicate relates to the 7 different personalities that Harman Smith has. These are:

Garcian Smith, The Cleaner
Weapon: Silenced Pistol/Golden Gun
Unique Abilities: Revives other characters. Only Garcian has this ability.

Dan Smith, The Hellion
Weapon: Demon Revolver
Unique Ability: Charged Demon Shot/Collateral Shot

Kaede Smith, Barefoot
Weapon: Scoped Pistol
Unique Ability: Suicidal Barrier Removal -  You have to see it to understand

Con Smith, The Speedster
Weapon: Dual Burst-Fire Pistols
Unique Abilities: Quick Run, Sonar

Coyote Smith, The Thief
Weapon: Revolver
Unique Abilities: Pick Locks, High Jump

Kevin Smith, The Ghost
Weapon: Throwing Knives
Unique Abilities: Invisibility

Mask De Smith, The Mask
Weapon: Dual Grenade Launchers
Unique Ability: Breakthrough

With these personalities you go through defeating the 'Heaven Smiles' which are an organization of invisible aliens. The story is rather odd, as you can imagine, but makes more sense than it does not... does that make sense? If you play it you will understand. The boss battles are a strong point of this game as they employ unconventional means to win. All in all a great game that flew under the radar.