You awake in a fog, remembering not much other than a few minutes of the previous night. Drugged? Knocked out in a bar fight? Dog attack? What exactly happened? Then you notice it: the chain connecting your ankle to the wall. It's inconvenient if nothing else. You see a few others also chained in other "stalls" separated by opaque sheets of thick glass, reminding you of showers. A small plasma cuts on in your stall, and all the others, judging by the lights shining through the glass, and a man with carrot-orange hair appears on the television and starts speaking in a gruff voice.
"I wanna play a game." Breaking off in cringe-inducing laughter- better described as a cackle- he continues in a higher voice. "So, if you haven't figured it out, you've all been selected! Yes, very special group you are. If you can't figure out why, then remember what your special talent is! Can't figure it out? It's killing" The man sneers from his side of the television, but only pauses a moment before continuing his 'greetings'. "We have selected you from groups around the world to... help us. See, my boss has some problems he needs taken care of... And all of you can help him. Your reward is your freedom." The camera pans to something behind him. Something that was yours. Something you need. "And if freedom isn't enough, we have some... leverage. If you want this," jerking his thumb at what/who they stole from you, "then you will do as we say. We've already put some little, itty-bitty bombs in your blood. Well, nanobots with a self-destruct mechanism, but I'm not much of a techie to care. We press one button: you die. And your precious back there is done for, too."
So, this is an Assassin RP with a twist. You don't have to be a highly-trained, sword-wielding killer, but you have to be proficient in one specific method of killing. And there will only be one person per method of killing, which can be from sword-killing to slapping in the face with a book, so long as you can kill with your method and it is a lethal method of inflicting wounds on someone. Also, each of you has had a person or item of great value held captive, so if you try to not follow orders, they kill you and break/kill the person/thing they're holding.
