Any good games with PVP for a one shot or short season? I was watching a review for the ALIEN RPG and there is a reference to secret agendas (classic Alien theme: somebody could be infected, an android or a corporate spy) and I was wondering if there are any systems (besides the new Aliens one) that would make for a tense and paranoid PVP scenario. 

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I run a bi-weekly 'RPG CLUB' where we mostly try out new things and I was thinking it would be interesting to try to run a one shot or short season of something where not all the players allegiances are the same. Any ideas for a good system for this?

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Especially doing stuff remote (tabletop sim + discord) gives me a lot of ability to private message players who want to engage in subterfuge.