Choice of Games has brought their Heroes Rise series to Steam, making it the first all-text game distributed that way. (Steam also carries
a few other things I would consider interactive fiction, such as Depression Quest, and IF’s relative Sunless Sea. But those games are somewhat more visual.)
CoG would like to bring more text games to Steam in the future, but the possibility of that will depend on sales, so they can use some support from Steam-using IF fans.