Testament's "True Believer" serves as a powerful track on the "Saw V" original motion picture soundtrack, released in 2008. The song exemplifies the band's signature blend of groove metal and melodic heaviness, featuring the characteristic dual-guitar harmonies and driving rhythms that defined their discography during the late 1990s and early 2000s. While the track was not part of their major studio albums like "Demonic" or "Screamlock," it stands as a significant contribution to the film's score, showcasing the group's ability to deliver intense, atmospheric metal suitable for cinematic horror. The recording captures the raw energy typical of Testament's live performances, reinforcing their reputation as a leading force in the thrash and groove metal genres.