I wanna get the missions running shortly, but for right now they won't serve much purpose but for people to gather and fight evil, save a princess, or whatever the mission is about. Missions can be put up by anyone, and can be completed by anyone. They might give some sort reward later, but as of right now they just be for fun.
The way it'll work is that someone will post a mission, detailing what they need to do, why there doing it, and how many should go at it. These threads can be open closed that's up to you deicide. To give an example someone my post a mission about saving Princess Peach (I assume you've played a Mario game before), This could be done by one person as Mario, and if you wanted two people, the other could be Luigi, and then someone would have to bowser (Note: People how take on the role of evil forces or boss character, has to come up with traps, problems, and things that make the hero's job hard) Then people would take in turn posting how Mario rescuing Peach. E.i Boswer might describe a puzzle or play an evil mini boss, Then Mario would try to figure it out or kill the boss, This would continue until Mario fails, or successes and then would move on to the next challenge, until he reaches peach.
Note there doesn't have to someone playing the bad guy, the people playing as the heroes can just make it up as the go along. There are no limits of how long or how silly you can make these missions, there just for fun and hopefully we can make really interesting stories.
Again just for fun there are no rewards yet, I just hope you guys have fun with this, and I hope this made sense, so enjoy