Renowned Explorers: International Society [Official Site] is a game about being a mean dickwad to everyone you meet. I hear there are other ways of playing it, but I can’t see why’d anyone want to do that. I played and praised it when it first came out, and after a few months of bugfixing and balance updates the team at Abbey Games have prepared the first content DLC for it – and it’s free!
The Mali Mystery update will add a new expedition, which I presume will be to Mali, and with it new leaderboards to compare your runs with those of your friends. When I played it I found the game to be rather solid, bar a couple of bugs, but the addition of new expeditions and places to go will address the issue I had with repeating the same expedition throughout multiple playthroughs. As they say, variety is the spice of life.