You'd like Thieves, then. It's played with a set of quartz runes, not cards, but it's easy enough to pick up. You draw your runes at the beginning, and decide which of them you'll keep, and which you'll ignore - and the ones you ignore, you make up your own runes that you'll be pretending you have. Everyone tries to pick apart everyone else's stories. For example, there's only two royal guards in the bag of runes, so if three people are claiming to be a guard... there's certainly a liar in the mix.