Kenshi is an open-ended strategy/rpg game that's currently in alpha state. I haven't quite figured out what the setting is supposed to be yet, but I guess you could call it japanese steam-punk. Anyway, the project is highly ambitious and the final feature list is almost too good to believe. If everything gets implemented as promised, Kenshi will feature one of the most complex and dynamic worlds ever simulated. I have played the game for like 60+ hours and it doesn't even have sound effects yet. The only downside is that most of the development is basically done by one guy and progression is rather slow.
You can get it on steam, if you are interested.