Hitman: Blood Money

Blood Money is the greatest title in the series yet. It manages to improve on its predecessors in nearly every department. To fully appreciate the hitman series, the missions must be played more than twice since there are so many ways to get to your targets. It feels fresh every time you enter a mission. Blood Money introduces the "Blood Money System" where the player earns money after completing missions which then can spend on gun customizations or additional intel about the mission. Anyway without spoiling much this is the best Hitman out thereand anyone who likes the stealth/action genre should grab a copy this instant.

~Wiki~

Hitman: Blood Money is the fourth game in the Hitman video game series. The PC demo was released on May 22, 2006. The game was released on May 26, 2006 in Europe and on May 30 in the United States. Hitman: Blood Money centres on assassinations carried out by Agent 47 (or, as he is referred to by the narrator, Mr. 47), as narrated in cutscenes by the former director of the FBI to a journalist invited to his home as they discuss 47. The wheelchair-bound ex-director recounts how his organization tracked 47 over a two-year period by observing his operations, each of which is played when it is mentioned in his story. It should be noted that during the interview, the ex-director mentions certain details that strongly contrast with what actually happened. The tone of the game, in complete contrast with the previous game, is operatic and often veers into the larger-than-life, recalling elements of the 'world-traveller' grandeur of Hitman 2: Silent Assassin.