The term "Contract killer" Refers to sombody who does Contract killing, such as a Hitman.
A Contract killing is a form of murder, in which one party hires another party to kill a target individual or group of people. It involves an illegal agreement between two or more parties in which one party agrees to kill the target in exchange for currency, monetary, or otherwise. Either party may be a person, group, or an organization.
Throughout history, contract killing has been associated with organized crime and also vendettas. For example, in recent United States history, the gang Murder, Inc., which committed hundreds of murders in the 1920s to the 1940s on behalf of the National Crime Syndicate.
Contract killing provides the hiring party with the advantage of not having to be directly involved in the killing. This makes it more difficult to connect said party with the murder and decreases guilt for the committed murder, because the hiring party did not commit the murder; they only enabled it to happen.
It is the name of the game--Contract Killer.It is also an awrd that will be awarded to the player after reaching level 15.