I got this idea from Birdman's games. You roll a d20 die, and post the result, and I do the rest. Now, onto the story.
Inside a governnent facility outside of Roswell New Mexico, scientists have discovered a new element, a mineral called cykronium. Scientists think it can be used as an alternate energy source. After some tests, they found that their theories were right. The cykronium powered the whole facility. The whole project was kept secret within the facility due to the high risk of nuclear meltdowns. It was even kept hidden from the government. Everything went well... until one day, the worse-case-scenario happened, a nuclear meltdown. The meltdown was so powerful, it started destroying the facility from the inside. And worse yet, caused a dimensional rift that brought a hostile alien species called the Korban. The Korban mercilessly killed scientists. No one could stop them... except for some research associates who were exposed to a high level of cykronium radiation. Instead of killing them like normal radiation, it gave them the ability to grow weapons from their limbs. They're called cykrons. And they have to stop the Korbans before they escape the facility.
To sign up, say your forum name, and tell me what weapon you want to grow out of your arms OR legs. And I'll generate your stats with my result-o-tron (d20 die).