Last Train to Bremen is one of the best oneshots I've played. Great character dynamics, a clear tone, and compelling theming, all built around a nail-biting core game mechanic. When I first read the rules I wasn't sure how the liar's dice would integrate with the storytelling, but it jives really well, generating unexpected character moments in semi-random ways and blending strategic motivations (winning the round) with narrative ones (getting involved with the story). We ended up with a band held together only by spite, where every member for different reasons had given up on the prospect of making genuinely good music. Our Cat very nearly made it out ... but in the end the Devil got his due!
I'll be raving about this one for a long time!