Hitman: Codename 47

The game that started the Hitman franchise. The protagonist is a talented yet nameless hitman, known only by his code number 47. He has no past, as he is a clone created by a mad scientist. In the beginning, 47 is being held in a mental hospital, before he escapes to become a killer for hire. His job is to eliminate high-ranking mafia bosses for large sums of money while attracting as little attention as possible. His missions may initially seem unrelated, but the plot eventually ties everything together.