I want a game that i can knife people in or stealthily kill them

[Fufinu]

Play MSG4: Online is not sold seperately and is part of the game. But to be honest the single-palayer is so over-whelming that I have not got to the online part yet :)

In MGS4 you can take the sneaky approach and stick knives or syringes into people if you chose to. You can also blast them out with weapons, or voodoo doll them into destruction :)