Citadels
When I wrote about Saboteur, I said that one of the most interesting aspects of that game was the mystery element of who-is-who, that is – who is a hard-working gold-digging dwarf, and who is the sneaky no-good back-stabbing saboteur. But, just imagine, if in saboteur you had only 2 hidden roles (couple more in expansion, to be honest) what can happen in a game where you have 8 of them! I’m talking about game of Citadels where you take on a role of 8 completely different characters every turn, trying to be the first player to build 8 districts in your city.