Octavia in the Underworld's Cello is a fangame that has been in the works since... 2013. The author originally expected to finish by Halloween 2013... I really hope it would be finished before G5 ends. So far, the latest demo available was released in 2014.

Today I was reminded of this game, and found that it has a recent update from the author herooftime1000...

It's a compilation of the many deaths of Octavia. Yup. This game is full of deaths... Beware.