15
GolfScript, 163
:n;:`"You shot the wumpus.
""The wumpus ate you.
""The pit swallowed you.
"{19:|rand}2*0|{[:,~,4%"ftvh"=.,+,@-]{20%}%}:^{;.^.+.3$?>"You feel a breeze.
"1$6"You smell a wumpus.
"4$8{$?-1>*p}2*'"#{'|):|';`head -1`}"'++~{3%}/={=3$=|{"Your shot missed.
"p@^3rand=@@}if}{=@;}if.[|4$6$]...