Waldo mode 2014

[atomic1fire]

There is a fugitive on the station. Cash prize if the station can successfully kill the fugitive, this fugitive is considered armed and dangerous, and may attempt to use the escape shuttle as a getaway vehicle. Further information about the fugitive's identity will be offered at a later time

You are a fugitive, try to avoid killing people all willy nilly, but do what you have to in order to escape on the escape shuttle alive. You won't have any special gear so you're on your own.

After 10-20 minutes or so reveal the player's identity so everyone starts hunting them down.

That gives them enough time to make some friends, get some guns, or escape the zlevel until the escape shuttle comes.

put it in mixed so the round isn't boring.

That's my suggestion.