Mission US is a multimedia project that immerses players in U.S. history content through free interactive games. The website provides four AVG (Adventure Game) under 4 periods in US history. Player would be play as a specific fictitious character and achieve goals by choosing different options both in words and in graphic. (from http://www.mission-us.org/pages/about)
In a way, it is very similar to what I want to do in my thesis project. But I want do make my game an RPG instead of just adventure, and that I want players to be able to experience the same event through different characters' perspectives. Furthermore, I hope the "choices" presented in the game can be more significant, i.e. to have the potential of influencing other people's lives.
You can check out these games here.