80 Days (yt trailer) is an iOS CYOA interactive fiction game from Meg Jayanth and inkle studios that casts you in the role of Phineas Fogg's manservant Jean Passepartout as the pair attempt to circumnavigate an alternate 1872 steampunk world in 80 days.
Some spoilers in the following:
Emily Short’s thoughts on the game
Meg Jayanth on Transforming Around the World in Eighty Days into an interactive story
Gamasutra’s interview with John Ingold (of inkle studios) about designing and building the game
An interview with several members of the dev team over at kaijupop
Free, downloadable soundtrack to the game on soundcloud