Interactive fiction is a game style from (waaaaay back) in the 1980s -- before graphics were much to sneeze at. I haven't really played it much in years (I actually have a Palm app that runs them).
There are a number of web-sites that have IF, including a few that let you play it online, without downloading anything, which is pretty ironic considering its origins.
Wikipedia (unsurprisingly) has a good write-up of it, including a modest collection of links to sites, if you want more detail.
