These are a few interactive fiction games based on the communities I used to frequent.
An interactive imagining of the newsgroup alt.games.creatures, created with the help of many of its inhabitants, who contributed room and person descriptions. Somewhat historical now, sadly.
Download Z-code - to play this you will need an interpreter for your computer - see the Inform 7 site for more details.
Download source - compiles on Inform 6.30 Library 6/10(bp).
Play online with the Parchment JS interpreter.
Back in 2001, in the far reaches of alt.fan.douglas-adams, pieceoftheuniverse posted a game transcript, looking for iain. I turned it into a fully-fledged game.
Download Z-code - to play this you will need an interpreter for your computer - see the Inform 7 site for more details.
Download source - compiles on Inform 6.21 Library 6/10.
Play online with the Parchment JS interpreter.