Hitman 2: Silent Assassin is the second game in the Hitman series. It follows the journey of a contract killer named 47 as he travels around the world, eliminating his target in order to save one of his few friends.
Hitman 2 is one of the few game that manage to do a disguise-based stealth right, with tons of disguises you are able to use all over the game. However, that does not make the game easier, as the AI in this game are capable of seeing through your disguise if you even act one bit suspicious (and some of them are even capable of seeing it from far away, as the ninja's from the Japan level can attest. Dem Psychic ninja). This makes sure that the game can be intense as well as satisfying when you do manage to beat the level with Silent Assassin rating.
This game also allows one to take multiple way to eliminate 47's targets. From disguising his way to the target, or going in with guns blazing high, there will be many ways one can do in this game, ensuring its replayability value.