Redshirt is finally available for pre-order, which means that as well as a Steam key you get access to the beta version. I've been keeping an eye on it since seeing an early incarnation of it at a conference earlier in the year. Played a bit last night and it's super-clever: a witty parody of social media relationships set on a Trekkie kind of space station.

Highly recommended! There are a few bugs to be ironed out but it's really enjoyable.