Leisure Suit Larry 5: Passionate Patti Does a Little Undercover Work is a graphical adventure game developed and published by Sierra On-Line for the Amiga, DOS and Macintosh computers in 1991.

[1] Many of the items players collect on their journey are merely optional, only triggering alternative solutions and affecting the final score, but not the game's progress.

Meanwhile, Patti is recruited by the FBI to dig up incriminating evidence on two record companies which are suspected of hiding subliminal messages in their songs.

Al Lowe has offered several reasons for the numbering discrepancy in the Leisure Suit Larry games, ranging from a scrapped sequel to an internal office prank.

[1] In truth, a multiplayer Leisure Suit Larry game was apparently in the works, designed to be played over Sierra On-Line's burgeoning online service.