Lexicon
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The basic idea of a Lexicon Game is that each player takes on the role of a scholar, from before scholarly pursuits became professionalized (or possibly after they ceased to be). You are cranky, opinionated, prejudiced and eccentric. You are also collaborating with a number of your peers - the other players - on the construction of an encyclopedia.
This encyclopedia is an historic one describing some bounded space - a world, or a nation, or an historic event, or perhaps a person or object. Your scholar should have his own entry on the Wiki, and generally you should stick to one scholar for the entire game. Scholars might very well be played over multiple Lexicon games, sometimes even by multiple players.