For this trophy you will need to earn one Silent Assassin Rating. At the end of each mission you get awarded a Rating which is a measurement of your performance in that particular level. The Silent Assassin Rating is the highest score that one can attain in this game. It is available in all missions apart from the last one. When you complete a mission you will see a stat screen; on the right there is an 'Aggression Bar' this has to be virtually empty and just above it there is a 'Stealth Bar', this has to be pretty much full in order to achieve the rating.
Note: The timing that you complete a level; the difficulty you play the game under and the amount of in-level saves that you use will not affect your end-of-level rating. Ideally you want to complete a level without any alerts, kills, shots fired as this will practically guarantee you a Silent Assassin Rating, though realistically we all know that this is is not achievable for most missions. The game has a 'Points System' that determines what kind of Rating you should receive. Here is a breakdown of what kind of repercussions you will get for your actions:
Subdue (Anesthetic) = 0 pts
Target Kill = 0 pts
Bullet Fired = 1 pts
Alert = 1.5 pts*
Close Encounter = 1 pts*
Someone Found Unconscious = 1.5 pts
Guard Kill = 1.5 pts
Civilian Kill = 1.75 pts
To earn a Silent Assassin rating you need to gain no more than 3 points otherwise you will be awarded a lower ranked rating. *If you get 2 alerts or 2 Close Encounters in one mission then you will the Silent Assassin Rating – even though the points system depicts that you will get away it. The difference between an 'Alert' and a 'Close Encounter' is that when your cover gets blown this will give you a Close Encounter, if the situation is not dealt with there and then the guards will raise an alarm thus resulting in you incurring an Alert. Here is a scenario to illustrate the Points System further:
In Mission 2: St Petersburg Stakeout you snipe and fire one bullet to kill your target. You Fibre Wire a guard, hide his body and escape without any alerts. Then you will be awarded the Silent Assassin rating because you only fired one bullet (1 pt) and killed only one guard (1.5 pts) this amounts to 2.5 pts, however, if a body was to be found and you were to get an alert, then you would lose the rating because you had gained an additional 1pt which would mean that your new total would be 3.5 pts which is a 0.5 point too much.
If you are still confused on how the rating system works this is basically what you can get away with within a level and still get the Silent Assassin Rating:
• 1 guard killed with a bullet to the head
• 1 guard wired and 1 bullet fired
• 2 guards wired
• 1 alert + 1 guard wired
• 1 alert + 2 bullets fired
• 2 people (either civilian or guard) found unconscious
• 1 close encounter + 1 guard wired
• 1 close encounter + 2 bullets fired
• 1 civilian killed + 1 bullet fired
It is by no means easy to get a Silent Assassin Rating, you can do everything perfectly up to and including extraction then the alerts come flooding in. There is an art to this trophy. It may well be the case you have to redo the levels a few times to grasp the perfect route to ensure you can make your way through levels from start to finish without having your cover being blown. See the [post=3603708]Professional Mode Guide[/post] for a written/video guide on how to get this rating on all levels but here some tips and factors that you may want to take into account when trying to earn this Rating.
Get a Disguise and Maintain your Cover
It is generally the case that you can not complete a mission just in your suit, most of the time you will reacquire a disguise in order to pass through places smoothly. To acquire a disguise you may have to knock out/kill a guard or sometimes there is a change of clothing just lying around to be changed into. Once you have your disguise it is vital that you maintain your cover. If your cover gets blown then realistically your chances of getting a Silent Assassin rating are gone along with it, because every guard within the compound tends to rush over and investigate. Keeping your disguise is relatively simple, refrain from making any erratic movements such as running and stopping or zig-zagging in opposite directions as this causes suspicion and, depending on what difficulty mode you're on, your cover could get blown as result.
Passing guards who have the same disguise can be a bit hairy but it is doable. Walk with conviction, do not delay, walk straight pass, do not touch them and nine times at of ten you will be fine. Sometimes the game can randomly glitch on you and you will get caught, but there is nothing you can do about it really. Lastly, sometimes the music will change so don't worry as this does not mean you have been spotted but you are practically on the verge of being so.
Anesthetic and Fibre Wire
In every mission you have a bottle of Anesthetic at your disposal. The affect of this is, if used correctly, you can knock somebody out for around 7 minutes. This is great for getting disguises or bypassing a vigilant guard who is obstructing your pathway. The main advantage is that it does not have a fatal outcome and therefore it will have no affect on your rating. This can, however, be a double-edged sword because the person who you knocked out can regain consciousness and be a hindrance. What usually happens is he will run and alert the nearby guards, they will then be looking for someone suspicious in the disguise that you have just taken. However if you do not take his disguise he will just wake up and continue like nothing has happened. Another drawback is that it takes 5-8 seconds to administer a full dose, which can cause a few problems. For example a guard or a civilian could walk by and spot you.
To conclude, Anesthetic is a great short term solution if you are confident in taking your victim's disguise, hiding his body and are able to complete the level's objectives quickly but as a long term solution, as discussed above, you can encounter some problems especially in the longer levels where it takes time to complete.
An alternative to the Anesthetic is the Fibre Wire, like Anesthetic you start with it in every mission and is one of 47's trademark weapons (the other being the Silver Ballers). Unlike the Anesthetic it deals with your opponent instantly. Providing you hide the body well, you can have no worries about it being discovered. However it's main drawback is that it has a fatal outcome so use this tactic in moderation. The way you use the Fibre Wire is very much the same as the Anesthetic, you sneak up to someone and from behind press if you quickly press to open the map when killing someone with the wire, then the fatality will occur much quicker. If you need to know how to use the Anesthetic then see Humanist.
This is only applicable if you are playing the game on Normal or Expert Difficulty but by pressing it will show you a map and it is a live monitor of the movements of every single person in the level. Furthermore it shows points of interest which can be disguises or Poison and so on. This feature is invaluable and it allows you to plan your routes through every level perfectly, because sometimes when trying to kill your target the last thing you want is a guard walking in on you. Lastly it also informs you of where the exits are which is the last thing you should do after finishing that level's objectives.
Note: When playing on Professional Difficulty you will still get the map feature however it only shows the whereabouts of your target, points of interest and extraction points.