Read this, this, and/or this. They will help explain things that I might over look or not think I need to explain. If you have any questions about navigating the main page of the wiki, or anything else that happens in-game, I’d be more than happy to answer them.
Claiming: Do not claim, except in the cases of L-1 or LyLo (if you don't know what these terms mean, where are you going to find them? If you answered "the wiki", you win. What you win is irrelevant). Claiming only serves two purposes: it gives scum more information than they need to have, and it distracts town.
Please note: "Town" is an alignment. By being town-aligned, you can have one of a few roles: Cop, Doctor, Jailkeeper, Bullet Proof, or Civilian (also known as Vanilla Townie - VT - or townie). Saying that you are townie, VT, or civilian means that you are claiming a role, even if not a power role. You don't want to do this, as it can narrow the field on potential legitimate power roles, thus making it easier for the scum to pick them off.
Voting: You should do it. Do not be afraid to vote. Voting can and does create discussion. Even if you think you don't have enough evidence for a vote, feel free to lay out what you do have. More discussion helps town. Less discussion hurts town. If you still don't think you have enough for a vote, lay out your evidence and add a FoS - finger of suspicion, meaning you find the person suspicious but aren't ready to vote.
Please note: DO NOT BE AFRAID TO DIE. Remember, you win if your alignment wins, NOT if you survive until the end. Yes, it sucks to get killed, but the goal is to win, not to survive.
Posting: You should do it. You should always do your best to post your thoughts as often as possible because posting generates discussion.
My suggestion: Go for posting at least once a day, if not more. Sometimes games vary in discussion levels, but the easiest way to catch scum is by getting them to talk, and the easiest way to catch those who don’t talk is by posting. The scum are not going to sit around with signs over their heads asking to be caught. You have to ask the hard questions and get them out into the open and make them mess up or say things they shouldn't. And I don't mean ask questions like, "How are you doing today?" Ask people about their motivations for doing things, or why they said things the way they did. Mafia is a game of details, and sometimes you have to be nitpicky.
Wall posts: Theoretically this helps the town because you’re getting you’re ideas out there for the town to see, read, and ultimately assess and analyze their own reads from; however, the more that’s written, the less people want to read, and the more that gets lost in translation.
My suggestion: Preview your posts to make sure only what needs to be said is said. Also, separate ideas by paragraphs, with a couple sentences each. This allows longer posts to be read with ease, and will more likely help others see all the information you/d like to say as opposed to potentially glossing over something that could be really important. Note how I’m formatting this post, though a little paragraphy as it is (also note that I don’t expect everyone to all of a sudden post this way
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