Ah right , I see . You DON ' T have to do it Suit Only . Makes no difference to score or challenges at all for ETs . So , definitely go ahead and use disguises . Silent Assassin conditions Only kill targets Do not get spotted No noticed kills No bodies found No evidence delete footage if caught on cameraThose are mostly selfexplanatory . Do not get spotted means don ' t get caught doing anything wrong e . g . trespassing , crimes . No noticed kills means don ' t allow anyone to see the target being killed . Sniping a target from a distance will count as noticed if anyone sees the target get shot they don ' t need to see you . Accidents and dropping dead from poison are unnoticed kills as long as you aren ' t seen injecting them or poisoning food in the wrong outfit and also don ' t count as Body Found even if it comes up on the screen . So even if you use these methods in front of other NPCs , you can still achieve Silent Assassin . You can shoot cameras quite easily with a silenced pistol to destroy them . NPCs don ' t tend to notice . Otherwise you have to destroy the footage on the camera terminals which is usually in a security room of some kind .