I was contacted a while ago by Richard Rutenberg, a fun and dedicated fellow who has been spending quite some time making a voice-activated version of the original Adventure/Colossal Cave! Available at 610-DEAR-BEN (610-332-7236), a quick visit to his website, 610dearben.com, and you can see the leaderboard, learn of projects to translate to other languages, and just marvel someone spent this time doing this.
Initially, the thing ran a bit slow – now it’s fast as lightning. Trust me, it’s worth a couple tries. Give it a whirl.