Hi there! Since you clicked on this topic, I will assume that you're interested in (or at least curious about) roleplaying in Champions Online. Since many people have never RP'd (roleplayed) before, I thought that now would be a good time to put together a mini-guide to help both the new and the experienced RPer, and to encourage the RP community in Champions Online. This isn't intended to step on the toes of Pathstalker's awesome RP guide stickied at the top of the forum. Rather, this is intended more as a supplement and as a second viewpoint on the process.
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What is Roleplaying?
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Basically, RPing is simply another way of saying "acting". For a normal non-RP character, you use your character to navigate the game world, but you interact with other players as yourself (the person behind the keyboard). If someone were to ask what you do for a living, you might answer "I work in a music store". If they ask if you have any pets, you might say "no, but my mom has a chihuahua".
However, when you're roleplaying your character, you're "acting" your character's part, just like a movie or TV actor. If someone were to ask about your day job, you'd RP with something like "when I'm not saving the day, I work as a mild-mannered bus driver."
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Why Roleplay?
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For many people, RP adds an extra dimension of depth and immersion to the game. It's a way to give your character personality, to flesh him (or her, or it) out and make him more real and believable. It also adds player-driven content and storyline to the game, which helps keep the game fresh and interesting. For example, you might come up with a back story for your character in which her husband was killed as an innocent bystander in a gang battle. So now she has decided to take up the mantle of a hero and focuses her heroic efforts on ridding the city of gangs. In doing this, you've added some extra depth to your character, and you can have a lot of fun RPing encounters with gang thugs.
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Getting Started RPing
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RP is surprisingly easy, although it takes some practice to become good at it and to avoid clichés. The first step is coming up with a good mental image of your character, and of course a good superhero needs a good name. "Pwnsurface" is a really questionable choice since it would take a very particular sort of hero to call himself by a name like that, in general it just comes off as a bad gamer monicker from Counterstrike. Luckily, superheroes have almost limitless naming potential, and the internet has lots of resources available to help you here. The following is a list of potentially useful links to help you choose a character name. Don't feel obligated to use them if you already have something in mind, but they can help steer you if you're having trouble coming up with something good:
http://thesaurus.reference.com/ - An online thesaurus that can suggest interesting words you could use.
http://en.wikipedia.org/wiki/Lists_of_Superheroes - Wikipedia's lists of existing superheroes in fiction. Don't directly copy any of these names, but instead use them as a guide for what makes a good hero name.
You might also build a name out of your character's concept. This is usually the most fun and interesting way of naming your character, especially for a superhero. My character, Polarity Shift, switches between light control and shadow manipulation depending on the time of day. Since light and darkness are polar opposites and since he shifts between the two uncontrollably, Polarity Shift seemed like a great name fitting of the character's concept.
Once you have a name and concept for your character, begin thinking of a back story. Where was your character born? How old is he? What kinds of things does he like and dislike? Is he a serious person or a light-hearted jokester? Why is he a hero? What are his goals? Does he banter and use clever quips against his heroes like Spider-Man, or is he the brooding silent type like Batman?
With superhero fiction, just about anything is up for grabs. You could be an alien from an as-yet-undiscovered world or dimension. Or you could be an elf from a long-lost kingdom. Or a telekinetic but otherwise ordinary human child. Or a giant doomsday robot salvaged and reprogrammed to help mankind. The possibilities are quite literally endless. Just try to avoid stepping on the toes of the established story in the game. Having a minor connection to an existing character (Ironclad saved my mother from being hit by a car once!) is fine. Having a major connection to an existing character (Witchcraft is my twin sister!) isn't fine. But pretty much everything else you could possibly imagine is up for grabs, so feel free to experiment!