Hitman 2 : Silent Assassin PC

Step into the world of a cold-blooded killer for hire, hunting and stalking your prey in a deadly game of cat and mouse. Obtain a disguise, find a way in, and silently finish the job unnoticed, or kick down the front door with gun's blazing, and take everybody out. It's completely up to you how to fulfill the contract. Be warned, some of your targets are heavily guarded, as well as completely paranoid. They'll be expecting you.