Yeah it ' s always more rewarding if you go into an ET blind and work out your own method . Here ' s some tips . Some people like to commit to the ' pure ' idea of never restarting , no matter what happens . If you care about the suits , as I do , then take time to plan and use the restart option . Often the fastest and easiest method for Silent Assassin is by using the Breaching ChargeFire Extinguisher combo . Lethal poison is often also a fairly simple option . If those methods seem a bit risky i . e . maybe there ' s too many people near the target and you ' re worried about killing them in the explosion then there ' s the foolproof method . Firstly , you need to get your target alone somehow . This might mean you have to , one by one , lure and subdue all of the NPCs in the vicinity . If anything goes wrong , you can restart . Then you can subdue your target . You can still restart . This allows you to ensure the situation is fully under control before you finally kill them . Don ' t get complacent until you have exited . It would be a shame to take out you target silently , and then accidentally get spotted trespassing etc . as you leave . Take your time and stay focused until you ' re out .