Blackmailer

Mechanics

 * When a blackmailed target tries to speak, they will simply receive a message saying "You are blackmailed." and nobody will be able to see their original message nor their attempt of speaking.
 * If the blackmailed target is voted to go on trial during the defense phase, the blackmailed target's message will be changed to "I am blackmailed."
 * The "I am blackmailed." message can now be sent more than four times if you leave a gap between trying to talk.
 * Your target is also unable to whisper.
 * If you visit a Veteran on alert and you are killed, they will still be blackmailed the next day.
 * A blackmailed Mayor can still reveal that day.
 * You cannot blackmail a target that was jailed that night.
 * You cannot affect your target's ability to write in their Last Will & death note.
 * You cannot affect your target's ability to vote and unvote someone.
 * You are able to hear whispers like the Spy.

Strategy

 * You can attempt calling for a Spy-test to prove yourself innocent. Although this may seem like the most obvious claim as it fits your investigation results, you will face the risk of not fitting the role list or being busted or the risk of a Sheriff or Lookout revealing that you're evil.
 * If the Consigliere finds a Town Investigative or Town Support role, it can be sometimes more useful to blackmail them then kill them outright, as they can reveal crucial information in their Last Will. Spies should especially be quieted as soon as possible.
 * Continue to blackmail the same person for a few turns, then casually ask why they have been so quiet, and isn't that rather suspicious. This only works when the person hasn't been giving signals about being blackmailed; additionally, be warned that this will tend to call attention to you - if it later becomes clear they were blackmailed, smart players will immediately be suspicious of anyone who pointed out that they were silent. For this reason, it might be best to wait and hope that a Townie notices their silence on their own.
 * Blackmailing the same person repeatedly has a few risks; if they're a Veteran, they'll easily kill you, while if they signal that they were blackmailed, Lookouts (or, worse, the Werewolf) may catch you blackmailing them the next night. On the other hand, like any member of the Mafia who visits the same person repeatedly, it has the advantage that you avoid revealing multiple people as non-Mafia to a Spy, although Smart Spies will easily notice that the person has been roleblocked or blackmailed for a few nights straight, therefore exposing a Blackmailer's existence.
 * Blackmailing the Mayor or Town Investigative can be good at making them less effective. Be careful, if you blackmailed a revealed Mayor and there is a Lookout watching him, you will be called out by the Lookout due to the Mayor's signal of being blackmailed. The Town Investigative roles might visit a confirmed Veteran in order to get his information out if he has to.
 * Neutrals such as the Serial Killer and the Arsonist will have no defense if they are blackmailed.
 * If you are roleblocked or your target dies in the same night, you or another member of the Mafia may act as if they have been blackmailed. (You may also simply choose not to blackmail anyone for a night.) However, this carries the danger of a Spy calling you out, thus getting you lynched.
 * Try to blackmail people who are accusing a member of the Mafia, or are chatty. Hopefully the Town will go on to other things if you blackmail them for a few nights, or if they die.
 * If you think you may be put on trial the next day, a good strategy is to not blackmail anyone that night and instead pretend you are blackmailed yourself. Again, this carries a risk of a Spy calling you out. However, if you have a Consort on your side, getting your consort to roleblock the Spy, providing you know who the Spy is, prevents the Spy from checking whether you were actually visited.
 * If you have a Consort, try targeting the same target. It is usually effective and can create a mislynch against someone (e.g a Retributionist that is roleblocked cannot do their night action and blackmailed cannot state that they were roleblocked).
 * If anyone attempts to collect roles via whispers, you can tell this all to the Mafia so they plan their operations more accurately now that the roles of the Townies have been revealed. You can also harvest info from whispers by Town Investigative roles, Jailors or Mediums and use them to your Mafia's advantage.
 * Blackmailing people every night isn't necessarily a good plan; when the Town realizes that people are being blackmailed, it becomes much harder for you to claim Spy, and they're likely to be more cautious with whispers.
 * Be careful about claiming Spy, especially to the Jailor. By the time your claim comes out, you might have become a Mafioso and lost your ability to pass a Spy-test.
 * If you do need to prove an older Spy claim after becoming a Mafioso, one option is to repeat a whisper from earlier in the game (which you heard back when you were a Blackmailer.) It's extremely dangerous and unreliable, but careless towns will occasionally accept this, if either of the people involved verifies it.
 * Another possible strategy, especially with four members of the Mafia in a Ranked/Ranked Practice game, is to simply not blackmail at all. If you're called up to the stand, this makes a Spy claim much more plausible. This requires the cooperation of the other members of the Mafia, especially in Ranked Practice, to make them not to reveal the existence of a Blackmailer to a real Spy.

Dealing with Blackmailers

 * If you are a part of town and suspect someone of being blackmailed, use this simple test to determine whether or not the target was blackmailed: ask the suspected person to vote and cancel the vote of someone twice if they are blackmailed, most people will appreciate you for checking.
 * If it's proven that someone was blackmailed, ask the Jailor to jail them. The Jailor will collect information of this person and will avoid the Blackmailer doing his work, it may even save the game, since Blackmailers usually blackmail people with important things to say.
 * Blackmailers will often call for a Spy-test to confirm themselves. To bust them, you'll need a Sheriff, confirmed Spy or a Lookout who caught the Blackmailer visiting someone. You can also filter roles claims and confirmed roles with the role list to find out whether the Spy claim fits in the role list or not. If it doesn't fit, then he's definitely a Blackmailer.
 * If it turns out that someone was blackmailed, be suspicious of anyone who accused them or who pointed out how silent they were; inexperienced Blackmailers will often accuse the person they blackmailed. In particular, if someone claims to be blackmailed on the stand, anyone who tries to dispute that or suggests that they are faking should be seen as extremely suspicious; it is extraordinary rare for evil roles to fake being blackmailed (due to the high risk of being outed by a Spy.) You should almost always vote innocent on people who say they were blackmailed on the stand, and investigate, roleblock, or even vote up the person who accused them to demand their role.
 * Blackmailers will often invent new "rules" about how blackmailing and the blackmailed message works to try and cast suspicion on the person they've been blackmailing. (For instance, complaining that they said they were blackmailed too many or too few times, or too quickly or too slow.) Turn it around and look at it from the other direction: Falsely claiming to be blackmailed is an extremely rare and risky strategy, one that has few benefits and which can be easily discounted by a Spy, while Blackmailers trying to get their targets lynched is extremely common. Therefore, any claim that someone who is acting blackmailed is "faking it" should be seen as extremely suspicious, especially if it comes from their main accuser.

Blackmailer