Interactive Fiction
Dave's games:

Ottumwa
This is version 5, containing a couple of minor bug fixes.
SPOILER ALERT! transcript of a completed game
for those who don't want to figure it out, but still want to read it.
Please let me know what you think by emailing me at dave(dot)faught(at)gmail(dot)com.
Other games:
Colossal Cave
Some background:
Lately I've has been learning about authoring Interactive Fiction (IF) text games.I've been using the Inform version 6 compilerso far, but have started trying out the Inform version 7 IDE.
Update - lots of outdated stuff has been removed from this page. Here are a couple more recent references:
IF Archive
IFDB
Interactive Fiction on Wikipedia