About ten years ago, I created a version of Eric Raymond's brilliant DOS game Sleuth. SleuthJS, as I called it, was designed to run in a browser window. It used CraftyJS, and a lot of people played it for some time. One thing which had been missing was a really brilliant feature which allowed you to enter the names of eight friends (or anyone, really) and then puzzle through the game with those people all ending up in hilarious situations as devised by the "murder generator".
Well, I've now added it to the game. You can sit around the computer with your family at Christmas and have your granny plot to murder your brother in the ballroom with a wrench. Great stuff!
You can play SleuthJS online on here at http://www.bencollier.info/sleuth