This game was really talked about a lot in the 2016 IFComp. It is unusual; it consists of many (< 500) short stories about apocalypses, many of them grim or with body horror, but with good writing. The player was invited to add to the total number of apocalypses.
I found a lot of the apocalypses very enjoyable. The format was hard for me to navigate, though; I couldn't find new stories at the pace that I wanted to. They are linked by keywords, sometimes, and sometimes not (i.e. there are dead-end links).
I enjoyed it.