As in every version of the Hitman series, in this fourth game, the gameplay and ultimate success relies almost entirely on stealthiness. The previous games' stories are mentioned during the development of this one, in which 47 discovers that he and his employer are being threatened by some other mysterious agency. He'll get more information about the rival agency's motives as he completes his own jobs. The starting mission leads you through one of 47's typical missions--to eliminate a theme park operator, whose negligence once cost the lives of many innocent people. There are more than a dozen missions in all, which have to be accomplished following a linear order. Most of the action is set somewhere in the United States. An interesting change with respect to previous versions is that it is not always necessary to shoot the victims, because the player has access to poisons, explosives, knives, and other means. The interface has improved dramatically over previous versions, and all the little actions seem much more fluid and responsive. Agent 47 can open doors, hide bodies, and interact with just about anything in his environment just by pressing a button. In general, the game satisfies the expectations of the Hitman's fans and is really worth-playing.