Interactive Fiction via www.ifarchive.org . We used to call them Text Adventures. Some weird people still play them, some even weirder people still make them.
Many are forms of puzzle and / or adventure games
Zoom is a player with Mac OS X and n*x versions, recent versions play TADS and zcode games.
Games
Adverbum is a fun comic game of word games and puns. A decent introduction to IF
Anchorhead is a lovecraft genre piece heavily influenced by Innsmouth, the Dunwich Horror, and some others. brehaut is up to day 3, but he screwed up and is going to have to start fresh. bah. its been really good so far.
