At PAX we debuted the “How to Play Interactive Fiction” postcard. If
somebody is sitting down in front of an IF game for the very first
time, this card should give him or her an idea of what commands are
likely to work — and what commands are *likely* to work. It’s not
trying to teach everything an IF expert would know; it’s just
conveying the pattern.–Andrew Plotkin, rec.arts.int-fiction