Backstab is the favored attack of thieves, murderers, and
other rogues. It can be used with any weapon type, but is most effective
with piercing weapons. The damage inflicted by a backstab is determined
by the attacker's level, his weapon skill, his backstab skill, and the
power of his opponent.
Assassinate is the master skill of silent & fast killing. It will give you a huge advantage on your first attack - even more, when you're using a gun type weapon (sniping rifles prefered).
Blackjack is a fast way to knock an enemy out with the first blow. It's extremely powerful but only does stun damage.
Syntax:
backstab <character>
assassinate <character>
blackjack <character>