Intruder is an American thrash metal band from Nashville, Tennessee. Formerly known as "Transgresser", the group began as a four-piece cover band. They saw the addition of rhythm guitarist Greg Messick after signing with Metal Blade Records.
Intruder released three full-length albums and one EP from 1987 to 1991 before splitting up in 1992. Since then, the band has reunited several times to play live shows.