Baf's Guide to the IF Archive: The Mulldoon Legacy: Information and downloads.
iFiction: The Mulldoon Legacy: Play the game on-line.
SPAG Review: "While Mulldoon is at heart more puzzlefest than story, it does a better-than-average job of integrating its puzzles with its plot and of making the latter more than a token effort, and arguably it's notable simply for those accomplishments." By Duncan Stevens.