Hunt the Wumpus was programmed by Gregory Yob in 1972. Like many other computer game programmers of the time, he used the hot new BASIC language. The BASIC interpreter ran on a mainframe with the CTSS operating system (an ancestor of Unix) at the University of Massachusettes in Dartmouth. Hunt the Wumpus was one of the very first computer-based adventure games ever and has, with Will Crowther's Advent (introduced in the same year), inspired programmers of many later classics the like the Zork series. The game's BASIC source code was published in the Creative Computing magazine in 1975 and has since been ported to about every existing language and platform.
Sources:
The Dot Eaters - Classic Video Game History (http://www.emuunlim.com/doteaters/), The Jargon File