Second Life polymath [this moniker given by himself] Loki Eliot created a masterful creepy game within our vast virtual world and my completely biased opinion is that THE WELL: INFIRMOS proves that SL is a marvelous place to design and deploy immersive adventure games.
So yeah: the kids are done trick/treating but THE WELL is still around for you to play in SL right now. It took me about 2 hours of scares and fun to complete the game and get my little gift.
I streamed it too on YouTube Gaming and yes = did have some help from friends.
Full disclosure: I did a bit of voice over for the game - won't tell you what character because that would be a bad spoiler. Also: a little boy who appears in the story has a voice that sounds soooo familiar to me....