Graveyard Keeper

In 71 libraries here. 24 launched it, and the typical player put in 8.2 h. 1 finished it.

The main story is about 23 evenings of two hours, or 28 with the extras.

Named in 0.7% of Name 100 runs, about 1 in 147: people remember it when asked to name 100 games from memory.