The best hacking games

There's a unique kind of simulation games that can be described only as "hacking simulations". The gameplay of hacking sims is centered around some kind of computer hacking, but can involve other types of activities usually part of different genres (adventure, strategy, etc.). Hacking is often implemented in games as a mini-game or a subset of non-mandatory skills (take, for example, Deus Ex, or System Shock).