I'm thinking of running a what I though was a One-Off campaign, but now I'm confused on the term. It is a one night game right? I'm thinking Darksun, lower level, and they start off in the slave pens. during a transfer, I'm not sure if I want them to try and escape, or if they find out that they want to get to the purposed destination. Either way I can end on a positive or negative note, and also leave it open for possibility of running another game or two after that. Please clarify the one-off term and critique my initial plan if it could be improved. thanks in advanced folks!